Journal articles: 'Acetone monitoring'

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Annerino, Anthony, Manoj Srinivasan, and Perena Gouma. "Wearable Acetone Monitoring." ECS Meeting Abstracts MA2022-01, no. 53 (July 7, 2022): 2185. http://dx.doi.org/10.1149/ma2022-01532185mtgabs.

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Most research aimed at measuring biomarkers on the skin is only concerned with sensing chemicals in sweat, but these methods are not truly noninvasive because they require substantial and often inconvenient amounts of sweat to get a reading. This project aims to create a truly non-invasive wearable sensor that continuously detects the gaseous acetone (a biomarker related to metabolic disorders) that ambiently comes out of the skin. Composite films of the intrinsically conducting polymer polyaniline and cellulose acetate, previously shown to exhibit a mechano-chemical actuation response to gaseous acetone, were tested for electrical response to low concentrations of gaseous acetone and possible interferents in dry, breathing quality air at room temperature.

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Fujino, A., T. Satoh, T. Takebayashi, H. Nakashima, H. Sakurai, T. Higashi, H. Matumura, H. Minaguchi, and T. Kawai. "Biological monitoring of workers exposed to acetone in acetate fibre plants." Occupational and Environmental Medicine 49, no. 9 (September 1, 1992): 654–57. http://dx.doi.org/10.1136/oem.49.9.654.

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Uchida, Yoko, Toshio Kawai, Tomojiro Yasugi, and Masayuki Ikeda. "Personal monitoring sampler for acetone vapor exposure." Bulletin of Environmental Contamination and Toxicology 44, no. 6 (June 1990): 900–904. http://dx.doi.org/10.1007/bf01702181.

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Mishra, Rajneesh Kumar, Vipin Kumar, Le Gia Trung, Gyu Jin Choi, Jeong Won Ryu, Sagar M. Mane, Jae Cheol Shin, Pushpendra Kumar, Seung Hee Lee, and Jin Seog Gwag. "WS2 Nanorod as a Remarkable Acetone Sensor for Monitoring Work/Public Places." Sensors 22, no. 22 (November 8, 2022): 8609. http://dx.doi.org/10.3390/s22228609.

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Here, we report the synthesis of the WS2 nanorods (NRs) using an eco-friendly and facile hydrothermal method for an acetone-sensing application. This study explores the acetone gas-sensing characteristics of the WS2 nanorod sensor for 5, 10, and 15 ppm concentrations at 25 °C, 50 °C, 75 °C, and 100 °C. The WS2 nanorod sensor shows the highest sensitivity of 94.5% at 100 °C for the 15 ppm acetone concentration. The WS2 nanorod sensor also reveals the outstanding selectivity of acetone compared to other gases, such as ammonia, ethanol, acetaldehyde, methanol, and xylene at 100 °C with a 15 ppm concentration. The estimated selectivity coefficient indicates that the selectivity of the WS2 nanorod acetone sensor is 7.1, 4.5, 3.7, 2.9, and 2.0 times higher than xylene, acetaldehyde, ammonia, methanol, and ethanol, respectively. In addition, the WS2 nanorod sensor also divulges remarkable stability of 98.5% during the 20 days of study. Therefore, it is concluded that the WS2 nanorod can be an excellent nanomaterial for developing acetone sensors for monitoring work/public places.

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Righettoni, Marco, Antonio Tricoli, Samuel Gass, Alex Schmid, Anton Amann, and Sotiris E. Pratsinis. "Breath acetone monitoring by portable Si:WO3 gas sensors." Analytica Chimica Acta 738 (August 2012): 69–75. http://dx.doi.org/10.1016/j.aca.2012.06.002.

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Lombardo, Luca, Nicola Donato, Sabrina Grassini, Alessio Gullino, Kaveh Moulaee, Giovanni Neri, and Marco Parvis. "High Sensitive and Selective Minisensor for Acetone Monitoring." IEEE Transactions on Instrumentation and Measurement 69, no. 6 (June 2020): 3308–16. http://dx.doi.org/10.1109/tim.2020.2967161.

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Anderson, Joseph C. "Measuring breath acetone for monitoring fat loss: Review." Obesity 23, no. 12 (November 2, 2015): 2327–34. http://dx.doi.org/10.1002/oby.21242.

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Ivanova, Anastasia M., and Elena O. Kolomina. "Analytical evaluation of breath acetone tubes." Butlerov Communications 61, no. 2 (February 29, 2020): 125–31. http://dx.doi.org/10.37952/roi-jbc-01/20-61-2-125.

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Breath analysis provides opportunities for further development of precise and quick non-invasive diagnostic tools. The important example is the monitoring of metabolic flexibility through the acetone levels in an exhale. Metabolic changes may cause such pathological conditions as metabolic syndrome, type 2 diabetes mellitus and obesity. It is proven that breath acetone levels can indicate the states of ketosis or ketoacidosis. The development of sensitive, selective and easy-to-use tests for breath acetone is a step to personalized diagnostics, preliminary diagnosis and therapeutic control The aim of the research was to evaluate analytical characteristics of acetone breath tubes intended for non-invasive monitoring of metabolic state. The test is designed as an easy-to-blow glass tube, comprising a chemical reagent highly sensitive to acetone. The reagent changes its color from yellow to magenta depending on acetone concentrations. Sensitivity assessment was performed by lab simulation of an exhaled breath with various acetone concentrations. The acetone levels corresponded to a range associated with various metabolic conditions and were controlled by titrimetric method and a portable breath analyzer. Additionally, specificity to a target gas in the presence of water and ethanol vapors was assessed. The results showed a correlation between the acetone concentration and the color gradients of the acetone sensitive reagent. The tubes show no reactions towards water and ethanol vapors.

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Arakawa, Takahiro, Ming Ye, Kenta Iitani, Koji Toma, and Kohji Mitsubayashi. "Acetone Bio-Sniffer (Gas-Phase Biosensor) for Monitoring of Human Volatile Using Enzymatic Reaction of Secondary Alcohol Dehydrogenase." Engineering Proceedings 6, no. 1 (May 20, 2021): 45. http://dx.doi.org/10.3390/i3s2021dresden-10165.

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We developed a highly sensitive acetone bio-sniffer (gas-phase biosensor) based on an enzyme reductive reaction to monitor breath acetone concentration. The acetone bio-sniffer device was constructed by attaching a flow-cell with nicotinamide adenine dinucleotide (NADH)-dependent secondary alcohol dehydrogenase (S-ADH) immobilized membrane onto a fiber-optic NADH measurement system. This system utilizes an ultraviolet light emitting diode as an excitation light source. Acetone vapor was measured as the fluorescence of NADH consumption by the enzymatic reaction of S-ADH. A phosphate buffer that contained oxidized NADH was circulated into the flow-cell to rinse the products and the excessive substrates from the optode; thus, the bio-sniffer enables the real-time monitoring of acetone vapor concentration. A photomultiplier tube detects the change in the fluorescence emitted from NADH. The relationship between the fluorescence intensity and acetone concentration was identified to be from 20 ppb to 5300 ppb. This encompasses the range of concentration of acetone vapor found in the breath of healthy people and of those suffering from disorders of carbohydrate metabolism. Then, the acetone bio-sniffer was used to monitor the exhaled breath acetone concentration change before and after a meal. When the sensing region was exposed to exhaled breath, the fluorescence intensity decreased and reached saturation immediately. Then, it returned to the initial state upon cessation of the exhaled breath flow. We anticipate its future use as a non-invasive analytical tool for the assessment of lipid metabolism in exercise, fasting and diabetes mellitus.

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Mishra, Rajneesh Kumar, Gyu-Jin Choi, Hyeon-Jong Choi, and Jin-Seog Gwag. "ZnS Quantum Dot Based Acetone Sensor for Monitoring Health-Hazardous Gases in Indoor/Outdoor Environment." Micromachines 12, no. 6 (May 22, 2021): 598. http://dx.doi.org/10.3390/mi12060598.

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This study reports the ZnS quantum dots (QDs) synthesis by a hot-injection method for acetone gas sensing applications. The prepared ZnS QDs were characterized by X-ray diffraction (XRD) and transmission electron microscopy analysis. The XRD result confirms the successful formation of the wurtzite phase of ZnS, with a size of ~5 nm. Transmission electron microscopy (TEM), high-resolution TEM (HRTEM), and fast Fourier transform (FFT) images reveal the synthesis of agglomerated ZnS QDs with different sizes, with lattice spacing (0.31 nm) corresponding to (111) lattice plane. The ZnS QDs sensor reveals a high sensitivity (92.4%) and fast response and recovery time (5.5 s and 6.7 s, respectively) for 100 ppm acetone at 175 °C. In addition, the ZnS QDs sensor elucidates high acetone selectivity of 91.1% as compared with other intrusive gases such as ammonia (16.0%), toluene (21.1%), ethanol (26.3%), butanol (11.2%), formaldehyde (9.6%), isopropanol (22.3%), and benzene (18.7%) for 100 ppm acetone concentration at 175 °C. Furthermore, it depicts outstanding stability (89.1%) during thirty days, with five day intervals, for 100 ppm at an operating temperature of 175 °C. In addition, the ZnS QDs acetone sensor elucidates a theoretical detection limit of ~1.2 ppm at 175 °C. Therefore, ZnS QDs can be a promising and quick traceable sensor nanomaterial for acetone sensing applications.

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De Rosa, E., M. Cellini, G. Sessa, C. Saletti, G. Rausa, G. Marcuzzo, and G. B. Bartolucci. "Biological monitoring of workers exposed to styrene and acetone." International Archives of Occupational and Environmental Health 65, S1 (January 1993): S107—S110. http://dx.doi.org/10.1007/bf00381318.

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Li, Houqian, Junming Sun, Gengnan Li, Di Wu, and Yong Wang. "Real-time monitoring of surface acetone enolization and aldolization." Catalysis Science & Technology 10, no. 4 (2020): 935–39. http://dx.doi.org/10.1039/c9cy02339a.

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Ama, Obinna, Mahek Sadiq, Michael Johnson, Qifeng Zhang, and Danling Wang. "Novel 1D/2D KWO/Ti3C2Tx Nanocomposite-Based Acetone Sensor for Diabetes Prevention and Monitoring." Chemosensors 8, no. 4 (October 16, 2020): 102. http://dx.doi.org/10.3390/chemosensors8040102.

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The acetone content in the exhaled breath of individuals as a biomarker of diabetes has become widely studied as a non-invasive means of quantifying blood glucose levels. This calls for development of sensors for the quantitative analysis of trace concentration of acetone, which is presents in the human exhaled breath. Traditional gas detection systems, such as the Gas Chromatography/Mass Spectrometry and several types of chemiresistive sensors are currently being used for this purpose. However, these systems are known to have limitations of size, cost, response time, operating conditions, and consistent accuracy. An ideal breath acetone sensor should provide solutions to overcome the above limitations and provide good stability and reliability. It should be a simple and portable detection system of good sensitivity, selectivity that is low in terms of both cost and power consumption. To achieve this goal, in this paper, we report a new sensing nanomaterial made by nanocomposite, 1D KWO (K2W7O22) nanorods/2D Ti3C2Tx nanosheets, as the key component to design an acetone sensor. The preliminary result exhibits that the new nanocomposite has an improved response to acetone, with 10 times higher sensitivity comparing to KWO-based sensor, much better tolerance of humidity interference and enhanced stability for multiple months. By comparing with other nanomaterials: Ti3C2, KWO, and KWO/Ti3C2Tx nanocomposites with variable ratio of KWO and Ti3C2Tx from 1:1, 1:2, 1:5, 2:1, 4:1, and 9:1, the initial results confirm the potential of the novel KWO/Ti3C2 (2:1) nanocomposite to be an excellent sensing material for application in sensitive and selective detection of breath acetone for diabetics health care and prevention.

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Kundu, S. K., J. A. Bruzek, R. Nair, and A. M. Judilla. "Breath acetone analyzer: diagnostic tool to monitor dietary fat loss." Clinical Chemistry 39, no. 1 (January 1, 1993): 87–92. http://dx.doi.org/10.1093/clinchem/39.1.87.

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Abstract Acetone, a metabolite of fat catabolism, is produced in excessive amounts in subjects on restricted-calorie weight-loss programs. Breath acetone measurements are useful as a motivational tool during dieting and for monitoring the effectiveness of weight-loss programs. We have developed a simple, easy-to-read method that quantifies the amount of acetone in a defined volume of exhaled breath after trapping the sample in a gas-analyzer column. The concentration of acetone, as measured by the length of a blue color zone in the analyzer column, correlates with results obtained by gas chromatography. Using the breath acetone analyzer to quantify breath acetone concentrations of dieting subjects, we established a correlation between breath acetone concentration and rate of fat loss (slope 52.2 nmol/L per gram per day, intercept 15.3 nmol/L, n = 78, r = 0.81). We also discussed the possibility of using breath acetone in diabetes management.

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Tanabe, Akiko, Hideko Mitobe, Kuniaki Kawata, Masaaki Sakai, and Akio Yasuhara. "New Monitoring System for Ninety Pesticides and Related Compounds in River Water by Solid-Phase Extraction with Determination by Gas Chromatography/Mass Spectrometry." Journal of AOAC INTERNATIONAL 83, no. 1 (January 1, 2000): 61–77. http://dx.doi.org/10.1093/jaoac/83.1.61.

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Abstract A new monitoring system was established for the determination of 90 pesticides and 10 pesticide degradation products in river water. The pesticides consisted of 18 fungicides, 30 insecticides, and 42 herbicides. The pesticides were extracted with a solid-phase, styrene-divinylbenzene copolymer, eluted with acetone, hexane, and ethyl acetate, and determined by gas chromatography/mass spectrometry. Overall recoveries ranged from 72 to 118%. The limits of detection were 0.01–0.1 μg/L. This system determines most of the pesticides used in Japan and was successfully applied to practical monitoring of water polluted with pesticides and related compounds.

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Toyooka, Tsuguyoshi, Satoshi Hiyama, and Yuki Yamada. "A prototype portable breath acetone analyzer for monitoring fat loss." Journal of Breath Research 7, no. 3 (July 24, 2013): 036005. http://dx.doi.org/10.1088/1752-7155/7/3/036005.

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Toshio, Kawai, Yasugi Tomojiro, Uchida Yoko, and Ikeda Masayuki. "A personal diffusive sampler for occupational acetone vapor exposure monitoring." Toxicology Letters 55, no. 3 (March 1991): 295–302. http://dx.doi.org/10.1016/0378-4274(91)90010-4.

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Indrarit, Naraporn, Kalya Eaiprasertsak, Tanakorn Osotchan, and Rawat Jaisutti. "Development of VOCs Gas Sensor Using PANi/PMMA Blend Film for Environment Monitoring." Applied Mechanics and Materials 848 (July 2016): 64–67. http://dx.doi.org/10.4028/www.scientific.net/amm.848.64.

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This work presents development of chemiresistor gas sensor based on polyaniline (PANi) blending with poly(methyl methacrylate) (PMMA) thin film for identification of volatile organic compounds (VOCs) relevant to environmental monitoring. The investigated VOCs are including acetone, methanol, ethanol and ammonia. The gas sensors are prepared by solution mixing between non-conducting form of PANi and PMMA in presence of NMP solution. The mixed solution is spun on aluminum interdigitated electrodes and converted into conducting form using HCl doping. Their sensitivity is measured at room temperature by applying constant voltage and measuring response current in the presence of target gases. The results show that PANi/PMMA blend film has higher surface roughness and porous structure leading to higher response to VOCs gases when compared to pure PANi thin film. The PANi/PMMA blend film exhibits the highest response to ammonia and the lowest to acetone vapor. It response shows little different between ethanol and acetone vapor. The different response characteristics to VOCs of PANi/PMMA blend film indicate that it can be used as active layer for room temperature VOCs sensor.

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Usman, Fahad, John Ojur Dennis, E. M. Mkawi, Yas Al-Hadeethi, Fabrice Meriaudeau, Thomas L. Ferrell, Osamah Aldaghri, and Abdelmoneim Sulieman. "Investigation of Acetone Vapour Sensing Properties of a Ternary Composite of Doped Polyaniline, Reduced Graphene Oxide and Chitosan Using Surface Plasmon Resonance Biosensor." Polymers 12, no. 11 (November 20, 2020): 2750. http://dx.doi.org/10.3390/polym12112750.

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This work reports the use of a ternary composite that integrates p-Toluene sulfonic acid doped polyaniline (PANI), chitosan, and reduced graphene oxide (RGO) as the active sensing layer of a surface plasmon resonance (SPR) sensor. The SPR sensor is intended for application in the non-invasive monitoring and screening of diabetes through the detection of low concentrations of acetone vapour of less than or equal to 5 ppm, which falls within the range of breath acetone concentration in diabetic patients. The ternary composite film was spin-coated on a 50-nm-thick gold layer at 6000 rpm for 30 s. The structure, morphology and chemical composition of the ternary composite samples were characterized by FTIR, UV-VIS, FESEM, EDX, AFM, XPS, and TGA and the response to acetone vapour at different concentrations in the range of 0.5 ppm to 5 ppm was measured at room temperature using SPR technique. The ternary composite-based SPR sensor showed good sensitivity and linearity towards acetone vapour in the range considered. It was determined that the sensor could detect acetone vapour down to 0.88 ppb with a sensitivity of 0.69 degree/ppm with a linearity correlation coefficient of 0.997 in the average SPR angular shift as a function of the acetone vapour concentration in air. The selectivity, repeatability, reversibility, and stability of the sensor were also studied. The acetone response was 87%, 94%, and 99% higher compared to common interfering volatile organic compounds such as propanol, methanol, and ethanol, respectively. The attained lowest detection limit (LOD) of 0.88 ppb confirms the potential for the utilisation of the sensor in the non-invasive monitoring and screening of diabetes.

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Rydosz, Artur. "Sensors for Enhanced Detection of Acetone as a Potential Tool for Noninvasive Diabetes Monitoring." Sensors 18, no. 7 (July 16, 2018): 2298. http://dx.doi.org/10.3390/s18072298.

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Measurement of blood-borne volatile organic compounds (VOCs) occurring in human exhaled breath as a result of metabolic changes or pathological disorders is a promising tool for noninvasive medical diagnosis, such as exhaled acetone measurements in terms of diabetes monitoring. The conventional methods for exhaled breath analysis are based on spectrometry techniques, however, the development of gas sensors has made them more and more attractive from a medical point of view. This review focuses on the latest achievements in gas sensors for exhaled acetone detection. Several different methods and techniques are presented and discussed as well.

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Fathy, Alaa, Marie Le Pivert, Young Jai Kim, Mame Ousmane Ba, Mazen Erfan, Yasser M. Sabry, Diaa Khalil, Yamin Leprince-Wang, Tarik Bourouina, and Martine Gnambodoe-Capochichi. "Continuous Monitoring of Air Purification: A Study on Volatile Organic Compounds in a Gas Cell." Sensors 20, no. 3 (February 10, 2020): 934. http://dx.doi.org/10.3390/s20030934.

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Air pollution is one of the major environmental issues that humanity is facing. Considering Indoor Air Quality (IAQ), Volatile Organic Compounds (VOCs) are among the most harmful gases that need to be detected, but also need to be eliminated using air purification technologies. In this work, we tackle both problems simultaneously by introducing an experimental setup enabling continuous measurement of the VOCs by online absorption spectroscopy using a MEMS-based Fourier Transform infrared (FTIR) spectrometer, while those VOCs are continuously eliminated by continuous adsorption and photocatalysis, using zinc oxide nanowires (ZnO-NWs). The proposed setup enabled a preliminary study of the mechanisms involved in the purification process of acetone and toluene, taken as two different VOCs, also typical of those that can be found in tobacco smoke. Our experiments revealed very different behaviors for those two gases. An elimination ratio of 63% in 3 h was achieved for toluene, while it was only 14% for acetone under same conditions. Adsorption to the nanowires appears as the dominant mechanism for the acetone, while photocatalysis is dominant in case of the toluene.

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Ferrero, Francisco J., Marta Valledor, Juan C. Campo, Alberto López, Pablo Llano-Suárez, María T. Fernández-Arguelles, José M. Costa-Fernández, and Ana Soldado. "Portable Instrument for Monitoring Environmental Toxins Using Immobilized Quantum Dots as the Sensing Material." Applied Sciences 10, no. 9 (May 7, 2020): 3246. http://dx.doi.org/10.3390/app10093246.

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A portable instrumental system was designed for the routine environmental monitoring of toxic volatile organic compounds (VOCs) in atmospheric conditions based on changes in the photoluminescence emission of semiconductor nanoparticles (quantum dots) entrapped in a sol-gel matrix as the solid sensing material. The sol-gel sensing material displayed a long-lived phosphorescent emission, which is quenched in the presence of trace levels of a volatile organic compound (acetone) in gaseous atmospheres. The developed instrument could measure and process the changes in the photoluminescence of the sensing material after exposure to gaseous acetone. The developed prototype device consists of a deep-ultraviolet ligtht-emitting diode (UV LED), which excites the chemical sensing material; an optical filter to remove scattered light and other non-desirable wavelengths; a photomultiplier tube (PMT) to convert the phosphorescence emission of the sensor phase to an electrical signal; and a microcontroller to correlate the signal with the analyte concentration. The developed prototype was evaluated for its ability to measure low levels of gaseous acetone in contaminated atmospheres with high sensitivity (detection limit: 9 ppm). The obtained results show the feasibility of this type of instrument for environmental analytical control purposes.

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Qiao, Yue, Zhaohua Gao, Yong Liu, Yan Cheng, Mengxiao Yu, Lingling Zhao, Yixiang Duan, and Yu Liu. "Breath Ketone Testing: A New Biomarker for Diagnosis and Therapeutic Monitoring of Diabetic Ketosis." BioMed Research International 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/869186.

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Background. Acetone,β-hydroxybutyric acid, and acetoacetic acid are three types of ketone body that may be found in the breath, blood, and urine. Detecting altered concentrations of ketones in the breath, blood, and urine is crucial for the diagnosis and treatment of diabetic ketosis. The aim of this study was to evaluate the advantages of different detection methods for ketones, and to establish whether detection of the concentration of ketones in the breath is an effective and practical technique.Methods. We measured the concentrations of acetone in the breath using gas chromatography-mass spectrometry andβ-hydroxybutyrate in fingertip blood collected from 99 patients with diabetes assigned to groups 1 (−), 2 (±), 3 (+), 4 (++), or 5 (+++) according to urinary ketone concentrations.Results. There were strong relationships between fasting blood glucose, age, and diabetic ketosis. Exhaled acetone concentration significantly correlated with concentrations of fasting blood glucose, ketones in the blood and urine, LDL-C, creatinine, and blood urea nitrogen.Conclusions. Breath testing for ketones has a high sensitivity and specificity and appears to be a noninvasive, convenient, and repeatable method for the diagnosis and therapeutic monitoring of diabetic ketosis.

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Šetka, Milena, Fabio A. Bahos, Daniel Matatagui, Isabel Gràcia, Eduard Figueras, Jana Drbohlavová, and Stella Vallejos. "Love Wave Sensors with Silver Modified Polypyrrole Nanoparticles for VOCs Monitoring." Sensors 20, no. 5 (March 6, 2020): 1432. http://dx.doi.org/10.3390/s20051432.

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Love wave sensors with silver-modified polypyrrole nanoparticles are developed in this work. These systems prove functional at room temperature with enhanced response, sensitivity and response time, as compared to other state-of-the-art surface acoustic wave (SAW) sensors, towards volatile organic compounds (VOCs). Results demonstrate the monitoring of hundreds of ppb of compounds such as acetone, ethanol and toluene with low estimated limits of detection (~3 ppb for acetone). These results are attributed to the use of silver-modified polypyrrole as a second guiding/sensitive layer in the Love wave sensor structure, which provides further chemically active sites for the gas-solid interactions. The sensing of low VOCs concentrations by micro sensing elements as those presented here could be beneficial in future systems for air quality control, food quality control or disease diagnosis via exhaled breath as the limits of detection obtained are within those required in these applications.

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Usman, Fahad, John Ojur Dennis, E. M. Mkawi, Yas Al-Hadeethi, Fabrice Meriaudeau, Yap Wing Fen, Amir Reza Sadrolhosseini, Thomas L. Ferrell, Ahmed Alsadig, and Abdelmoneim Sulieman. "Acetone Vapor-Sensing Properties of Chitosan-Polyethylene Glycol Using Surface Plasmon Resonance Technique." Polymers 12, no. 11 (November 4, 2020): 2586. http://dx.doi.org/10.3390/polym12112586.

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To non-invasively monitor and screen for diabetes in patients, there is need to detect low concentration of acetone vapor in the range from 1.8 ppm to 5 ppm, which is the concentration range of acetone vapor in diabetic patients. This work presents an investigation for the utilization of chitosan-polyethylene glycol (PEG)-based surface plasmon resonance (SPR) sensor in the detection of trace concentration acetone vapor in the range of breath acetone in diabetic subjects. The structure, morphology, and elemental composition of the chitosan-PEG sensing layer were characterized using FTIR, UV-VIS, FESEM, EDX, AFM, and XPS methods. Response testing was conducted using low concentration of acetone vapor in the range of 0.5 ppm to 5 ppm using SPR technique. All the measurements were conducted at room temperature and 50 mL/min gas flow rate. The sensor showed good sensitivity, linearity, repeatability, reversibility, stability, and high affinity toward acetone vapor. The sensor also showed better selectivity to acetone compared to methanol, ethanol, and propanol vapors. More importantly, the lowest detection limit (LOD) of about 0.96 ppb confirmed the applicability of the sensor for the non-invasive monitoring and screening of diabetes.

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Weber, Ines C., Nina Derron, Karsten Königstein, Philipp A. Gerber, Andreas T. Güntner, and Sotiris E. Pratsinis. "Monitoring Lipolysis by Sensing Breath Acetone down to Parts‐per‐Billion." Small Science 1, no. 4 (March 12, 2021): 2100004. http://dx.doi.org/10.1002/smsc.202100004.

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Boumali, Sara, Mohamed Taoufik Benhabiles, Ahmed Bouziane, Fouad Kerrour, and Khalifa Aguir. "Acetone discriminator and concentration estimator for diabetes monitoring in human breath." Semiconductor Science and Technology 36, no. 8 (July 6, 2021): 085010. http://dx.doi.org/10.1088/1361-6641/ac0c63.

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Weber, Ines C., Nina Derron, Philipp A. Gerber, Andreas T. Guntner, and Sotiris E. Pratsinis. "Metabolic Health Monitoring By Continuous Sensing of Breath Acetone at ppb." ECS Meeting Abstracts MA2021-01, no. 55 (May 30, 2021): 1342. http://dx.doi.org/10.1149/ma2021-01551342mtgabs.

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Suntrup III, Donald J., Timothy V. Ratto, Matt Ratto, and James P. McCarter. "Characterization of a high-resolution breath acetone meter for ketosis monitoring." PeerJ 8 (September 24, 2020): e9969. http://dx.doi.org/10.7717/peerj.9969.

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Background The ketone bodies beta-hydroxybutyrate (BHB) and acetone are endogenous products of fatty acid metabolism. Although ketone levels can be monitored by measuring either blood BHB or breath acetone, determining the precise correlation between these two measurement methods has been challenging. The purpose of this study is to characterize the performance of a novel portable breath acetone meter (PBAM) developed by Readout, Inc., to compare single versus multiple daily ketone measurements, and to compare breath acetone (BrAce) and blood BHB measurements. Methods We conducted a 14-day prospective observational cohort study of 21 subjects attempting to follow either a low-carbohydrate/ketogenic or a standard diet. Subjects were asked to concurrently measure both blood BHB and BrAce five times per day and report the results using an online data entry system. We evaluated the utility of multiple daily measurements by calculating the coefficient of variation (CV) for each daily group of measurements. We calculated the correlation between coincident BrAce and blood BHB measurements using linear ordinary least squares regression analysis. We assessed the ability of the BrAce measurement to accurately predict blood BHB states using receiver operating characteristic (ROC) analysis. Finally, we calculated a daily ketone exposure (DKE) using the area under the curve (AUC) of a ketone concentration versus time graph and compared the DKE of BrAce and blood BHB using linear ordinary least squares regression. Results BrAce and blood BHB varied throughout the day by an average of 44% and 46%, respectively. The BrAce measurement accurately predicted whether blood BHB was greater than or less than the following thresholds: 0.3 mM (AUC = 0.898), 0.5 mM (AUC = 0.854), 1.0 mM (AUC = 0.887), and 1.5 mM (AUC = 0.935). Coincident BrAce and blood BHB measurements were moderately correlated with R2 = 0.57 (P < 0.0001), similar to literature reported values. However, daily ketone exposures, or areas under the curve, for BrAce and blood BHB were highly correlated with R2 = 0.80 (P < 0.0001). Conclusions The results validated the performance of the PBAM. The BrAce/BHB correlation was similar to literature values where BrAce was measured using highly accurate lab instruments. Additionally, BrAce measurements using the PBAM can be used to predict blood BHB states. The relatively high daily variability of ketone levels indicate that single blood or breath ketone measurements are often not sufficient to assess daily ketone exposure for most users. Finally, although single coincident blood and breath ketone measurements show only a moderate correlation, possibly due to the temporal lag between BrAce and blood BHB, daily ketone exposures for blood and breath are highly correlated.

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Alizadeh, Naader, Hoda Jamalabadi, and Farnaz Tavoli. "Breath Acetone Sensors as Non-Invasive Health Monitoring Systems: A Review." IEEE Sensors Journal 20, no. 1 (January 1, 2020): 5–31. http://dx.doi.org/10.1109/jsen.2019.2942693.

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Junne, Stefan, Eva Klein, Alexander Angersbach, and Peter Goetz. "Electrooptical measurements for monitoring metabolite fluxes in acetone–butanol–ethanol fermentations." Biotechnology and Bioengineering 99, no. 4 (2008): 862–69. http://dx.doi.org/10.1002/bit.21639.

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Pruthi, Vikas, and Swaranjit Singh Cameotra. "Rapid method for monitoring maximum biosurfactant production obtained by acetone precipitation." Biotechnology Techniques 9, no. 4 (April 1995): 271–76. http://dx.doi.org/10.1007/bf00151574.

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Fang, Yu, Yi-Qing Yin, Dao-Dao Hu, and Gai-Ling Gao. "Monitoring the Aggregation of Dansyl Chloride in Acetone through Fluorescence Measurements." Chinese Journal of Chemistry 20, no. 4 (August 26, 2010): 317–21. http://dx.doi.org/10.1002/cjoc.20020200405.

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Lan, Kuibo, Zhi Wang, Xiaodong Yang, Junqing Wei, Yuxiang Qin, and Guoxuan Qin. "Flexible silicon nanowires sensor for acetone detection on plastic substrates." Nanotechnology 33, no. 15 (January 19, 2022): 155502. http://dx.doi.org/10.1088/1361-6528/ac46b3.

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Abstract Acetone commonly exists in daily life and is harmful to human health, therefore the convenient and sensitive monitoring of acetone is highly desired. In addition, flexible sensors have the advantages of light-weight, conformal attachable to irregular shapes, etc. In this study, we fabricated high performance flexible silicon nanowires (SiNWs) sensor for acetone detection by transferring the monocrystalline Si film and metal-assisted chemical etching method on polyethylene terephthalate (PET). The SiNWs sensor enabled detection of gaseous acetone with a concentration as low as 0.1 parts per million (ppm) at flat and bending states. The flexible SiNWs sensor was compatible with the CMOS process and exhibited good sensitivity, selectivity and repeatability for acetone detection at room temperature. The flexible sensor showed performance improvement under mechanical bending condition and the underlying mechanism was discussed. The results demonstrated the good potential of the flexible SiNWs sensor for the applications of wearable devices in environmental safety, food quality, and healthcare.

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Liu, Wen Ju, Chen Sun, Pei Xia Zhao, and Shao Feng Wang. "Solubility of Stearic Acid in Ethanol, 1-Propanol, 2-Propanol, L-Butanol, Acetone, Methylene Chloride, Ethyl Acetate and 95% Ethanol from (293 to 315) K." Advanced Materials Research 550-553 (July 2012): 71–74. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.71.

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Solubility of stearic acid in ethanol, 1-propanol, 2-propanol,l-butanol, acetone, methylene chloride, ethyl acetate and 95% ethanol was experimentally determined by the synthetic method from (293 to 315)K. The laser monitoring observation technique was used to determine the disappearance of the solid phase in a solid + liquid mixture. The solubility of stearic acid in methylene chloride was found to be the highest, and the value in 95% ethanol was the lowest. Results are correlated by semi-empirical equations, which show a good fit to the experimental data.

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San, Xiaoguang, Yue Zhang, Lei Zhang, Guosheng Wang, Dan Meng, Jia Cui, and Quan Jin. "One-Step Hydrothermal Synthesis of 3D Interconnected rGO/In2O3 Heterojunction Structures for Enhanced Acetone Detection." Chemosensors 10, no. 7 (July 11, 2022): 270. http://dx.doi.org/10.3390/chemosensors10070270.

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Acetone detection is of great significance for environmental monitoring or diagnosis of diabetes. Nevertheless, fast and sensitive detection of acetone at low temperatures remains challenging. Herein, a series of rGO-functionalized three-dimensional (3D) In2O3 flower-like structures were designed and synthesized via a facile hydrothermal method, and their acetone-sensing properties were systematically investigated. Compared to the pure 3D In2O3 flower-like structures, the rGO-functionalized 3D In2O3 flower-like structures demonstrated greatly improved acetone-sensing performance at relatively low temperatures. In particular, the 5-rGO/In2O3 sensor with an optimized decoration exhibited the highest response value (5.6) to 10 ppm acetone at 150 °C, which was about 2.3 times higher than that of the In2O3 sensor (2.4 at 200 °C). Furthermore, the 5-rGO/In2O3 sensor also showed good reproducibility, a sub-ppm-level detection limit (1.3 to 0.5 ppm), fast response and recovery rates (3 s and 18 s, respectively), and good long-term stability. The extraordinary acetone-sensing performance of rGO/In2O3 composites can be attributed to the synergistic effect of the formation of p-n heterojunctions between rGO and In2O3, the large specific surface area, the unique flower-like structures, and the high conductivity of rGO. This work provides a novel sensing material design strategy for effective detection of acetone.

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Saasa, Valentine, Mervyn Beukes, Yolandy Lemmer, and Bonex Mwakikunga. "Blood Ketone Bodies and Breath Acetone Analysis and Their Correlations in Type 2 Diabetes Mellitus." Diagnostics 9, no. 4 (December 17, 2019): 224. http://dx.doi.org/10.3390/diagnostics9040224.

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Analysis of volatile organic compounds in the breath for disease detection and monitoring has gained momentum and clinical significance due to its rapid test results and non-invasiveness, especially for diabetes mellitus (DM). Studies have suggested that breath gases, including acetone, may be related to simultaneous blood glucose (BG) and blood ketone levels in adults with types 2 and 1 diabetes. Detecting altered concentrations of ketones in the breath, blood and urine may be crucial for the diagnosis and monitoring of diabetes mellitus. This study assesses the efficacy of a simple breath test as a non-invasive means of diabetes monitoring in adults with type 2 diabetes mellitus. Human breath samples were collected in Tedlar™ bags and analyzed by headspace solid-phase microextraction and gas chromatography-mass spectrometry (HS-SPME/GC-MS). The measurements were compared with capillary BG and blood ketone levels (β-hydroxybutyrate and acetoacetate) taken at the same time on a single visit to a routine hospital clinic in 30 subjects with type 2 diabetes and 28 control volunteers. Ketone bodies of diabetic subjects showed a significant increase when compared to the control subjects; however, the ketone levels were was controlled in both diabetic and non-diabetic volunteers. Worthy of note, a statistically significant relationship was found between breath acetone and blood acetoacetate (R = 0.89) and between breath acetone and β-hydroxybutyrate (R = 0.82).

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Aparicio-Martínez, Eider, Velia Osuna, Rocio B. Dominguez, Alfredo Márquez-Lucero, E. Armando Zaragoza-Contreras, and Alejandro Vega-Rios. "Room Temperature Detection of Acetone by a PANI/Cellulose/WO3Electrochemical Sensor." Journal of Nanomaterials 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/6519694.

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Chemical sensing based on semiconducting metal oxides has been largely proposed for acetone sensing, although some major technical challenges such as high operating temperature still remain unsolved. This work presents the development of an electrochemical sensor based on nanostructured PANI/cellulose/WO3composite for acetone detection at room temperature. The synthesized materials for sensor preparation were polyaniline (PANI) with a conductivity of 13.9 S/cm and tungsten trioxide (WO3) in monoclinic phase doped with cellulose as carbon source. The synthesized materials were characterized by high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), cyclic voltammetry (CV), and Raman spectroscopy. The composite was applied for acetone detection in the range of 0 to 100 ppmv at room temperature with electrochemical impedance spectroscopy (EIS) for monitoring resistance changes proportional to acetone concentration. The developed sensor achieved a calculated limit of detection of 10 ppm andR2of 0.99415 with a RSD of 5% (n=3) at room temperature. According to these results, the developed sensor is suitable for acetone sensing at room temperatures without the major shortcomings of larger systems required by high operating temperatures.

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Zhang, Ning, Huijun Li, Zhouqing Xu, Rui Yuan, Yongkun Xu, and Yanyu Cui. "Enhanced Acetone Sensing Property of a Sacrificial Template Based on Cubic-Like MOF-5 Doped by Ni Nanoparticles." Nanomaterials 10, no. 2 (February 22, 2020): 386. http://dx.doi.org/10.3390/nano10020386.

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Studying an acetone sensor with prominent sensitivity and selectivity is of great significance for the development of portable diabetes monitoring system. In this paper, cubic-like NiO/ZnO composites with different contents of Ni2+ were successfully synthesized by modifying MOF-5 with Ni2+-doped. The structure and morphology of the prepared composites were characterized by XRD, XPS, and SEM. The experimental results show that the NiO/ZnO composite showed an enhanced gas sensing property to acetone compared to pure ZnO, and the composites showed the maximum response value when Ni2+ loading amount was 5 at%. The response value of the 5% NiO/ZnO composite to acetone (500 ppm) at the optimum operating temperature (340 °C) is 7.3 times as that of pure ZnO. At the same time, the 5% NiO/ZnO composite has excellent selectivity and reproducibility for acetone. The gas sensing mechanism of the heterojunction sensor was described.

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Ajibola, Taiye Mary, Morufu Olusola Ibitoye, Yusuf Kola Ahmed, and Zainab Gbemisola Jimoh. "Non-invasive Glucometer using Acetone Gas Sensor for Low Income Earners’ Diabetes Monitoring." ELEKTRIKA- Journal of Electrical Engineering 21, no. 1 (April 20, 2022): 6–13. http://dx.doi.org/10.11113/elektrika.v21n1.285.

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A glucometer is an important device used to monitor blood glucose level of diabetes patients to prevent degenerated health conditions. The conventional glucometers are characterized by piercing of the sample site for patients’ testing. The invasive nature of these glucometers is painful to the patients and some patients are also scared at the sight of blood. To promote glucometer acceptance among patients, it is important to develop a non-invasive glucometer using acetone gas sensor with “exhaled breath” collected non-invasively as the sample for the glucometer. After the device development, exhaled breath sample of twenty subjects with age range of 20 to 55 years from a University were taken using the developed acetone sensor device. Prior to the exhaled breath sample collection, the blood glucose levels of the volunteered subjects were also determined using the conventional and proprietary invasive clinical method. To infer whether there is significant different between the mean of the results obtained from the conventional and the exhaled breath method, a t-test was carried out on the results and P values of 0.9860 and 0.9306 were obtained for fasting blood sugar and random blood sugar respectively, indicating no significant differences in the results obtained from the developed device when compared with the proprietary device. Hence, non-invasive glucometer using acetone gas sensor can be used to promote inexpensive personalized diabetes monitoring without inflicting pain on the patients. Promotion of this device could also reduce the expenses incurred on lancet and test strips, thus, making it suitable for low income earners.

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41

Ajibola, Taiye Mary, Morufu Olusola Ibitoye, Yusuf Kola Ahmed, and Zainab Gbemisola Jimoh. "Non-invasive Glucometer using Acetone Gas Sensor for Low Income Earners’ Diabetes Monitoring." ELEKTRIKA- Journal of Electrical Engineering 21, no. 1 (April 20, 2022): 6–13. http://dx.doi.org/10.11113/elektrika.v21n1.285.

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A glucometer is an important device used to monitor blood glucose level of diabetes patients to prevent degenerated health conditions. The conventional glucometers are characterized by piercing of the sample site for patients’ testing. The invasive nature of these glucometers is painful to the patients and some patients are also scared at the sight of blood. To promote glucometer acceptance among patients, it is important to develop a non-invasive glucometer using acetone gas sensor with “exhaled breath” collected non-invasively as the sample for the glucometer. After the device development, exhaled breath sample of twenty subjects with age range of 20 to 55 years from a University were taken using the developed acetone sensor device. Prior to the exhaled breath sample collection, the blood glucose levels of the volunteered subjects were also determined using the conventional and proprietary invasive clinical method. To infer whether there is significant different between the mean of the results obtained from the conventional and the exhaled breath method, a t-test was carried out on the results and P values of 0.9860 and 0.9306 were obtained for fasting blood sugar and random blood sugar respectively, indicating no significant differences in the results obtained from the developed device when compared with the proprietary device. Hence, non-invasive glucometer using acetone gas sensor can be used to promote inexpensive personalized diabetes monitoring without inflicting pain on the patients. Promotion of this device could also reduce the expenses incurred on lancet and test strips, thus, making it suitable for low income earners.

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42

TRIVEDI, SANDESH, SATISH C. SHARMA, and SURAJ P. HARSHA. "SINGLE WALLED-BORON NITRIDE NANOTUBES BASED NANORESONATOR FOR SENSING OF ACETONE MOLECULES." Nano 09, no. 08 (December 2014): 1450086. http://dx.doi.org/10.1142/s1793292014500866.

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Sensor application for detection of acetone molecule(s) present in human breath is developed for cantilevered single walled-boron nitride nanotube (SW-BNNT) and analyzed in the present work. The same can be used for continuous monitoring of diabetes. Biocompatibility nature of BNNTs justify their use in biomedical applications. The possible use of the BNNT as nanomechanical resonators is explored in the present study. An atomistic three dimensional (3D) space frame model of fixed-free SW-BNNT-based nanoresonator is developed. The proposed model investigates the feasibility of SW-BNNT for sensing acetone molecules present in human breath for detecting diabetes. Dynamic analysis of fixed-free SW-BNNT for variable aspect ratios of nanotubes is carried out. Presence of acetone molecule(s) causes a shift in the resonant frequency of SW-BNNT. It is observed that this frequency shift is quite significant with presence of more acetone molecules and shows mass sensitivity of SW-BNNT toward acetone molecules. Continuum mechanics-based analytical approach has been used to validate the newly developed sensor equations as the results are found to be in close proximity. The result thus paves new path for the application of SW-BNNTs as biosensor for detection of acetone molecule(s) present in human breath.

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Ibanescu, Constanta, Andrei Rosu, Camelia Mihailescu, Simona Bistriceanu, Gabriela Halitchi, Maria Lungu, and Maricel Danu. "ENVIRONMENTALLY FRIENDLY HYDROGELS BASED ON POLYACRYLAMIDE AND ACETONE-FORMALDEHYDE RESINS: RHEOLOGICAL MONITORING." Environmental Engineering and Management Journal 13, no. 3 (2014): 723–28. http://dx.doi.org/10.30638/eemj.2014.076.

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Marhuenda, Dolores, M. Jos� Prieto, J. Francisco Periago, Juan Marti, Luigi Perbellini, and A. Cardona. "Biological monitoring of styrene exposure and possible interference of acetone co-exposure." International Archives of Occupational and Environmental Health 69, no. 6 (June 3, 1997): 455–60. http://dx.doi.org/10.1007/s004200050174.

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Yao, Xingjun, Qiulin Deng, Shuhao Wang, Wei Wang, YIxin Hou, Zhibin Gao, Yingshuang Wu, and Zengjing Guo. "Acetone Iodination Kinetics in Flow with Online UV Monitoring and Continuous Control." ChemistrySelect 4, no. 17 (May 6, 2019): 5116–21. http://dx.doi.org/10.1002/slct.201900527.

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46

Yoshii, Kimihiko, Mai Okada, Yukari Tsumura, Yumiko Nakamura, Susumu Ishimttsu, and Yasuhide Tonogai. "Supercritical Fluid Extraction of Ten Chloracetanilide Pesticides and Pyriminobac-Methyl in Crops: Comparison with the Japanese Bulletin Method." Journal of AOAC INTERNATIONAL 82, no. 5 (September 1, 1999): 1239–45. http://dx.doi.org/10.1093/jaoac/82.5.1239.

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Abstract In Japan, the maximum residue limit and an analytical bulletin method for alachlor and pyriminobac-methyl were recently published. Because this method has some problems, such as many interfering chromatographic peaks for some residues in certain crops, time-consuming sample preparation, etc., we have developed an alternative method. In the bulletin method, pesticides are extracted with acetone, reextracted with ethyl acetate, partitioned with hexane–acetonitrile, cleaned up on a Florisil column, and quantitatively determined by gas chromatography with flame thermionic detector (GC-FTD). In the developed method, pesticides are extracted by supercritical fluid extraction and directly cleaned up with a trap column consisting of Extrelut and Florisil (acetone–n-hexane, 3 + 7, as the eluent) or Bond Elut SAX and PSA (acetone–n-hexane, 1 +1, as the eluent). The test solution was quantitatively determined by GC with mass spectrometry. Alachlor, pyriminobac-methyl, and 9 other chloracetanilide pesticides were studied. Average recoveries of spiked samples (0.1 ppm) were between 52 and 104% with the bulletin method and between 68 and 106% with the developed method. By using the Japanese bulletin method, 3 pesticides from Japanese radish could not be measured because of many interfering peaks on the GC–FTD chromatogram, even on selected-ion monitoring (SIM) chromatograms. On the other hand, by using the developed method, SIM chromatograms had fewer interfering peaks than did the Japanese bulletin method.

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47

Ivanova, Anastasia M., and Anatoly I. Ginak. "Breath acetone as a potential marker of metabolic flexibility." Butlerov Communications 61, no. 1 (January 31, 2020): 111–17. http://dx.doi.org/10.37952/roi-jbc-01/20-61-1-111.

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A brief analysis of the metabolic flexibility and its role in human body was made. Metabolic flexibility is the ability to respond or adapt to conditional changes in metabolic demand. This broad concept has been propagated to explain insulin resistance and mechanisms governing fuel selection between glucose and fatty acids, highlighting the metabolic inflexibility of obesity and diabetes. Monitoring is relevant because disrupted metabolic flexibility, or metabolic inflexibility, however, is associated with many pathological conditions and may underlie the epidemic changes in metabolic disease. The number of the blood ketones increases when the human body tries to adapt metabolism and aptly utilize moderate amounts fatty acids in case the glucose is shortage. Acetone is formed by the non-enzymatic decarboxylation of acetoacetic acid. Acetone cannot be used by the tissues. It appears in urine, sweat and exhaled air. The correlation between breath acetone and lipid oxidation was studied to ensure that the level buildup is associated with increased lipid oxidation. Breath acetone concentration is well understood to be a non-invasive measure of ketosis and more accurately reflects the rate of lipid oxidation than urine or sweat acetone concentrations. Due to the thin capillary wall, ventilation and gaseous metabolism contributes rapid transmission of short-term and minimum acetone concentration changes in tissues or blood-stream, that up regulates correlation of metabolic disorders and acetone concentration in exhaled air. Metabolic flexibility control method using the breath acetone is relevant and the future potential is attributed for personalized diagnostics, pre-diagnosis and therapeutic modalities correction is huge.

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TSUMURA, YUKARI, HIROAKI MATSUKI, YASUHIDE TONOGAI, YUMIKO NAKAMURA, SEIYA KATO, and YOSHIO ITO. "Simultaneous Determination of Vamidothion and Its Oxidation Metabolites in Potatoes and Apples by Gas Chromatography." Journal of Food Protection 56, no. 5 (May 1, 1993): 437–40. http://dx.doi.org/10.4315/0362-028x-56.5.437.

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A method for simultaneous determination of vamidothion (V0) and its oxidation metabolites vamidothion sulphoxide (V1) and vamidothion sulphone (V2) in potatoes and apples has been developed. Fifty grams of a sample was homogenized and extracted with acetone followed by evaporation to remove the acetone. To the residual aqueous solution, a 10% sodium chloride solution was added, and the coextractives were eliminated by washing the aqueous solution with 10% ethyl acetate in hexane. Then, V0, V1, and V2 were extracted from the aqueous solution using dichloromethane. The organic layer was evaporated to dryness and filled up to 2 ml with ethyl acetate. Two microliters of the extract were injected into gas chromatograph-mass spectrometer set for selected ion monitoring. The column used was a CBP-1 capillary column (0.2 mm inside diameter × 15 m, 0.25 μm film thickness). Gas chromatographic conditions were investigated in detail and only nonpolar capillary columns gave satisfactory results. The retention time of undecomposed V1 has been reported for the first time. The recoveries for the fortified potatoes and apples were 93–109% for V0, 62–108% for V1, and 64–89% for V2, when they were fortified at levels of 0.01–5.0 ppm. Detection limits were 0.01, 0.2, and 0.05 ppm for V0, V1, and V2, respectively.

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Sorocki, Jakub, and Artur Rydosz. "A Prototype of a Portable Gas Analyzer for Exhaled Acetone Detection." Applied Sciences 9, no. 13 (June 27, 2019): 2605. http://dx.doi.org/10.3390/app9132605.

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The paper presents the development of a portable gas analyzer prototype for exhaled acetone detection, employing an application-suited gas sensor array and 3D printing technology. The device provides the functionality to monitor exhaled acetone levels, which could be used as a potential tool for non-invasive diabetes monitoring. The relationship between exhaled acetone concentrations and glucose in blood is confirmed in the literature, including research carried out by the authors. The design process is presented including a general consideration for the sensor array construction, which is the core for sensing gases, as well as requirements for the measurement chamber it is to be placed in. Moreover, the mechanical design of the 3D-printed housing is discussed to ensure the ergonomics of use as a hand-held device while keeping the hardware integrity. Also, the processing hardware is discussed to provide sufficient computing power to handle the stand-alone operation while being energy efficient, enabling long battery-powered operation. Finally, calibration and measurement, as well as the analyzer operation, are shown, validating the proposed class of exhaled acetone-detection capable meters.

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Bistriceanu, Simona, Ana Niconov, Camelia Mihailescu, Constanta Ibanescu, and Victor Bulacovschi. "MICROWAVE ASSISTED SYNTHESIS OF ACETONE - FORMALDEHYDE RESIN." Environmental Engineering and Management Journal 11, no. 4 (2012): 753–58. http://dx.doi.org/10.30638/eemj.2012.097.

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Journal articles on the topic 'Acetone monitoring'

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