Conecte-se

Bibliografias temáticas / Chromatographic analysis / Artigos de revistas

Siga este link para ver outros tipos de publicações sobre o tema: Chromatographic analysis.

Artigos de revistas sobre o tema "Chromatographic analysis"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 29 de julho de 2024

Crie uma referência precisa em APA, MLA, Chicago, Harvard, e outros estilos

Selecione um tipo de fonte:

Veja os 50 melhores artigos de revistas para estudos sobre o assunto "Chromatographic analysis".

Ao lado de cada fonte na lista de referências, há um botão "Adicionar à bibliografia". Clique e geraremos automaticamente a citação bibliográfica do trabalho escolhido no estilo de citação de que você precisa: APA, MLA, Harvard, Chicago, Vancouver, etc.

Você também pode baixar o texto completo da publicação científica em formato .pdf e ler o resumo do trabalho online se estiver presente nos metadados.

Veja os artigos de revistas das mais diversas áreas científicas e compile uma bibliografia correta.

1

Denisov, I. S., V. V. Korotkov e D. S. Smirnov. "Gaschromatographic monitoring of volatile pollutants of urban air: optimizing analysis and concentrating". Sanitarnyj vrač (Sanitary Doctor), n.º 10 (1 de outubro de 2020): 70–76. http://dx.doi.org/10.33920/med-08-2010-08.

Texto completo da fonte

Resumo:

For determining 22 volatile organic compounds in the atmospheric air, the operating modes of the gas chromatographic complexes «chromatography-mass spectrometer — two-stage thermodesorber» and «gas chromatograph with 2 FID — static headspace analysis sampler» are optimized. The modes provide the values of the separation coefficients of the chromatographic peaks in the range of 1.5 ÷ 21. It has been experimentally established that the highest desorption efficiency of volatile organic compounds is registered when the sample is concentrated into Tenax TA sorption tubes.

Estilos ABNT, Harvard, Vancouver, APA, etc.

2

Onjia, Antonije, Tatjana Vasiljevic, Djuro Cokesa e Mila Lausevic. "Validation of chromatographic analysis". Chemical Industry 56, n.º 2 (2002): 76–79. http://dx.doi.org/10.2298/hemind0202076o.

Texto completo da fonte

Resumo:

The parameters for the development of a chromatographic (HPLC) method and its validation are discused in the paper. Chromatographic analysis involves a multi-step procedure consisting of sample collection, pretreatment instrumental measurements and data processing. Emphasize was placed on the instrumental part of the analysis presuming that the contributions of the other variables were minor. The roles of precision, accuracy, detection limit, quantification limit, specificity, selectivity, range, linearity and robustness, as well as system suitability in the analytical application of chromatography were described. Recommendations for the validation of these parameters according to ICH and FDA guidelines are given. The criteria of validation described above can be almost completely applied to other instrumental chromatographic techniques such as GC, GC-MS, HPTLC, etc.

Estilos ABNT, Harvard, Vancouver, APA, etc.

3

Christie, W. W. "Lipid chromatographic analysis". TrAC Trends in Analytical Chemistry 13, n.º 10 (novembro de 1994): xiii. http://dx.doi.org/10.1016/0165-9936(94)85032-1.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

4

Janis, Linda J., e Fred E. Regnier. "Immunological-Chromatographic Analysis". Journal of Chromatography A 444 (julho de 1988): 1–11. http://dx.doi.org/10.1016/s0021-9673(01)94003-8.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

5

Lyle, S. J. "Inorganic chromatographic analysis". Endeavour 9, n.º 4 (janeiro de 1985): 205–6. http://dx.doi.org/10.1016/0160-9327(85)90088-2.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

6

Hais, I. M. "Chromatographic adsorption analysis". Journal of Pharmaceutical and Biomedical Analysis 9, n.º 9 (janeiro de 1991): 785–86. http://dx.doi.org/10.1016/0731-7085(91)80223-v.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

7

Worsfold, PaulJ. "Chromatographic Environmental Analysis". Analytica Chimica Acta 296, n.º 2 (outubro de 1994): 220. http://dx.doi.org/10.1016/0003-2670(94)80268-8.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

8

Cooke, M. "Inorganic Chromatographic Analysis." Analytica Chimica Acta 183 (1986): 328–29. http://dx.doi.org/10.1016/0003-2670(86)80117-9.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

9

Custodio-Mendoza, Jorge Antonio, Patryk Pokorski, Havva Aktaş, Alicja Napiórkowska e Marcin Andrzej Kurek. "Advances in Chromatographic Analysis of Phenolic Phytochemicals in Foods: Bridging Gaps and Exploring New Horizons". Foods 13, n.º 14 (18 de julho de 2024): 2268. http://dx.doi.org/10.3390/foods13142268.

Texto completo da fonte

Resumo:

Chromatographic analysis of phenolic phytochemicals in foods has significantly advanced over the past decade (2014–2024), meeting increasing demands for precision and efficiency. This review covers both conventional and advanced chromatographic techniques used for detecting phenolic phytochemicals in foods. Conventional methods like High-Performance Liquid Chromatography, Ultra High-Performance Liquid Chromatography, Thin-Layer Chromatography, and Gas Chromatography are discussed, along with their benefits and limitations. Advanced techniques, including Hydrophilic Interaction Liquid Chromatography, Nano-LC, Multidimensional Liquid Chromatography, and Capillary Electrophoresis, are highlighted for their innovations and improved capabilities. The review addresses challenges in current chromatographic methods, emphasizing the need for standardized and validated procedures according to the Food and Drug Administration, European Cooperation for Accreditation of Laboratories, and The International Organization for Standardization guidelines to ensure reliable and reproducible results. It also considers novel strategies for reducing the environmental impact of chromatographic methods, advocating for sustainable practices in analytical chemistry.

Estilos ABNT, Harvard, Vancouver, APA, etc.

10

Zhang, Jing, e Hongye Zhang. "Research progress on the detection of water-soluble vitamins in food using liquid chromatography". Theoretical and Natural Science 37, n.º 1 (4 de junho de 2024): 158–69. http://dx.doi.org/10.54254/2753-8818/37/20240183.

Texto completo da fonte

Resumo:

Currently, liquid chromatography is widely used for the analysis and determination of water-soluble vitamins (WSVs) in functional foods. However, due to the diversity of sample characteristics and the requirement for purification accuracy, the chromatographic conditions and specific methods used vary. This paper reviews the chromatographic conditions of liquid chromatography techniques for detecting WSVs in food, as well as the selection of liquid chromatography methods in different application fields. The chromatographic conditions include chromatographic columns, column temperature, mobile phase, flow rate, and elution gradient, and the application scope of different chromatographic conditions is compared. Liquid chromatography methods include high-performance liquid chromatography and liquid chromatography-tandem mass spectrometry, and discussions are made on the applications and prospects of these two methods under different chromatographic conditions. Therefore, this review provides research insights into different chromatographic conditions and methods for food quality inspection and biochemical analysis research.

Estilos ABNT, Harvard, Vancouver, APA, etc.

11

Diroh, Vina Awallina, Rio Gusraya Unaldi, Mutiara Wayu Puspasari e Muhammad Muzhil Aslam. "NSAID Analysis Using Chromatographic and Spectrophotometric Methods". Asian Journal of Analytical Chemistry 1, n.º 1 (7 de junho de 2023): 12–17. http://dx.doi.org/10.53866/ajac.v1i1.269.

Texto completo da fonte

Resumo:

The purpose of this review article to evaluate the content of Nonsteroidal anti-inflammatory drugs (NSAID) using chromatographic and spectrophotometric methods. This journal review uses seven analytical methods on NSAID , namely high performance liquid chromatography (HPLC), fourier transform infrared (FTIR), gas chromatography (GC), thin layer chromatography (TLC), and spectrophotometry methods. The outcomes of every method have been elaborated in this paper and all of them can be used to detect the NSAID compounds.

Estilos ABNT, Harvard, Vancouver, APA, etc.

12

Valverde, Antonio. "Chromatographic Pesticide Residue Analysis". Journal of AOAC INTERNATIONAL 83, n.º 3 (1 de maio de 2000): 679. http://dx.doi.org/10.1093/jaoac/83.3.679.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

13

McCreedy, Tom. "Chromatographic analysis of pharmaceuticals". Analytica Chimica Acta 347, n.º 3 (agosto de 1997): 397. http://dx.doi.org/10.1016/s0003-2670(97)81191-9.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

14

Macek, Karel. "Chromatographic analysis of pharmaceuticals". Journal of Chromatography A 545, n.º 1 (maio de 1991): 219–20. http://dx.doi.org/10.1016/s0021-9673(01)88712-4.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

15

Manetto, Giulia, e Franco Tagliaro. "Chromatographic analysis of pharmaceuticals". Journal of Chromatography A 786, n.º 2 (outubro de 1997): 385–87. http://dx.doi.org/10.1016/s0021-9673(97)00753-x.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

16

Sparidans, Rolf W., Jan den Hartigh, Serge Cremers e Pieter Vermeij. "Chromatographic analysis of bisphosphonates". Journal of Chromatography A 868, n.º 1 (janeiro de 2000): 141–42. http://dx.doi.org/10.1016/s0021-9673(99)01233-9.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

17

Lee, Hyoung S., e Victor Hong. "Chromatographic analysis of anthocyanins". Journal of Chromatography A 624, n.º 1-2 (outubro de 1992): 221–34. http://dx.doi.org/10.1016/0021-9673(92)85681-i.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

18

Childs, JJ. "Chromatographic analysis of alkaloids". Biochemical Education 19, n.º 4 (outubro de 1991): 221. http://dx.doi.org/10.1016/0307-4412(91)90116-p.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

19

Barry, Eugene F. "Chromatographic analysis of pharmaceuticals". Microchemical Journal 44, n.º 2 (outubro de 1991): 237. http://dx.doi.org/10.1016/0026-265x(91)90103-v.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

20

Willför, S. M., A. I. Smeds e B. R. Holmbom. "Chromatographic analysis of lignans". Journal of Chromatography A 1112, n.º 1-2 (abril de 2006): 64–77. http://dx.doi.org/10.1016/j.chroma.2005.11.054.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

21

Christie, W. W. "Chromatographic analysis of phospholipids". Zeitschrift für Lebensmittel-Untersuchung und -Forschung 181, n.º 3 (setembro de 1985): 171–82. http://dx.doi.org/10.1007/bf02425573.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

22

Potier, P. "Chromatographic Analysis of Alkaloids". Biochimie 74, n.º 6 (junho de 1992): 590. http://dx.doi.org/10.1016/0300-9084(92)90162-8.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

23

Eichman, Chad, Brian Rivera e M. Christina Malinao. "Chromatographic Analysis for PAT". Genetic Engineering & Biotechnology News 38, n.º 20 (15 de novembro de 2018): 20. http://dx.doi.org/10.1089/gen.38.20.09.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

24

Molyneux, Russell J., Dale R. Gardner, Lynn F. James e Steven M. Colegate. "Polyhydroxy alkaloids: chromatographic analysis". Journal of Chromatography A 967, n.º 1 (agosto de 2002): 57–74. http://dx.doi.org/10.1016/s0021-9673(01)01558-8.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

25

Karnes, H. Thomas. "Chromatographic analysis of pharmaceuticals". Journal of Pharmaceutical Sciences 80, n.º 3 (março de 1991): 303–4. http://dx.doi.org/10.1002/jps.2600800326.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

26

Saha, Sourav, Sandip Mallik, Bikash Debnath, Waikhom Somraj Singh, Abu Md Ashif Ikbal e Kuntal Manna. "Application of HPLC in Biomedical Research for Pesticide and Drug Analysis". Global Journal of Medical, Pharmaceutical, and Biomedical Update 18 (7 de setembro de 2023): 20. http://dx.doi.org/10.25259/gjmpbu_40_2023.

Texto completo da fonte

Resumo:

Compared to traditional liquid chromatography, high-performance liquid chromatography (HPLC) delivers better results for analyzing unknown compounds. It permits faster resolution time, better peak shapes, repeatable responses, and greater precision. A comprehensive literature search has been conducted using online academic databases such as Google Scholar, PubMed, Web of Science, and Scopus, using keywords such as HPLC, pesticide analysis, drugs analysis, chromatographic conditions, and HPLC Column type. Total 75 number of articles were collected from peer-reviewed journals. With the help of literature review we have summarized the chromatographic condition of 30 drug candidates and 27 pesticide candidates. The study’s findings can guide future researchers to understand the chromatographic parameters of drugs and pesticides.

Estilos ABNT, Harvard, Vancouver, APA, etc.

27

Memon, Najma, Tahira Qureshi, Muhammad Iqbal Bhanger e Muhammad Imran Malik. "Recent Trends in Fast Liquid Chromatography for Pharmaceutical Analysis". Current Analytical Chemistry 15, n.º 4 (3 de julho de 2019): 349–72. http://dx.doi.org/10.2174/1573411014666180912125155.

Texto completo da fonte

Resumo:

Background: Liquid chromatography is the workhorse of analytical laboratories of pharmaceutical companies for analysis of bulk drug materials, intermediates, drug products, impurities and degradation products. This efficient technique is impeded by its long and tedious analysis procedures. Continuous efforts of scientists to reduce the analysis time resulted in the development of three different approaches namely, HTLC, chromatography using monolithic columns and UHPLC. Methods: Modern column technology and advances in chromatographic stationary phase including silica-based monolithic columns and reduction in particle and column size (UHPLC) have not only revolutionized the separation power of chromatographic analysis but also have remarkably reduced the analysis time. Automated ultra high-performance chromatographic systems equipped with state-ofthe- art software and detection systems have now spawned a new field of analysis, termed as Fast Liquid Chromatography (FLC). The chromatographic approaches that can be included in FLC are hightemperature liquid chromatography, chromatography using monolithic column, and ultrahigh performance liquid chromatography. Results: This review summarizes the progress of FLC in pharmaceutical analysis during the period from year 2008 to 2017 focusing on detecting pharmaceutical drugs in various matrices, characterizing active compounds of natural products, and drug metabolites. High temperature, change in the mobile phase, use of monolithic columns, new non-porous, semi-porous and fully porous reduced particle size of/less than 3μm packed columns technology with high-pressure pumps have been extensively studied and successively applied to real samples. These factors revolutionized the fast high-performance separations. Conclusion: Taking into account the recent development in fast liquid chromatography approaches, future trends can be clearly predicated. UHPLC must be the most popular approach followed by the use of monolithic columns. Use of high temperatures during analysis is not a feasible approach especially for pharmaceutical analysis due to thermosensitive nature of analytes.

Estilos ABNT, Harvard, Vancouver, APA, etc.

28

Verpoorte, R. "Chromatographic analysis of alkaloids (Chromatographic Science Series Vol. 53)". Journal of Chromatography A 545, n.º 1 (maio de 1991): 221–22. http://dx.doi.org/10.1016/s0021-9673(01)88713-6.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

29

Nagels, Luc. "Chromatographic analysis of pharmaceuticals, chromatographic science series vol 74". TrAC Trends in Analytical Chemistry 16, n.º 10 (novembro de 1997): X. http://dx.doi.org/10.1016/s0165-9936(97)82183-8.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

30

Pytela, Oldřich, Jaroslava Hálová e Miroslav Ludwig. "Interpretation of chromatographic characteristics of mobile phase in liquid chromatography by means of solvent parameters". Collection of Czechoslovak Chemical Communications 55, n.º 11 (1990): 2629–35. http://dx.doi.org/10.1135/cccc19902629.

Texto completo da fonte

Resumo:

The paper applies the methods of correlation analysis and analysis of latant variables (PCA, PLS, canonical correlation) to study the interrelations of general chromatographic characteristics in the adsorption and partition chromatography (ε0, P', χe, χd, χn, Iap) and interpretation posibilities of these characteristics by means of general solvent parameters. The analyzed set of chromatographical parameters has been found to be relatively heterogeneous, its dominant properties being expressible by two principal components including 75.6% of source variability. The chemometrical solvent scale with three parameters PAC, PBC, PPC proved suitable for interpretation of the chromatographic parameters. This scale in the PLS method with two necessary latent variables explains 64.9% of the variability of matrix of chromatographic characteristic and enables their description. An elution solvent series has been constructed on the basis of this chemometrical solvent scale by the method of multicriterial decision ELECTRA III.

Estilos ABNT, Harvard, Vancouver, APA, etc.

31

AHUMADA FORIGUA, Diego Alejandro, e Jairo Arturo GUERRERO DALLOS. "Reduction of matrix effects in pesticide residue analysis in food by programmable temperature vaporizer". Vitae 20, n.º 3 (17 de dezembro de 2013): 184–1941. http://dx.doi.org/10.17533/udea.vitae.11056.

Texto completo da fonte

Resumo:

Background: The phenomenon known as the “matrix-induced chromatographic response enhancement” commonly affects the sensibility, precision, and accuracy in pesticide residue analysis. The presence of matrix effects can be given by adsorption and/or thermal decomposition of pesticides on the gas chromatograph injection port. Objective: To reduce the matrix-induced chromatographic response enhancement on pesticide residues analysis in food through the use of several operational modes of programmable temperature vaporizer inlet. Methods: The analyses were carried out in potato (Solanum tuberosum) extracts by gas chromatography with mass spectrometry detector. In this study, four programmable temperature vaporizer splitless modes were investigated: hot, pulsed, cold and solvent vent. Another topic developed in this study has to do with the influence of injection volume, assessed for the matrix effects. Results: The analysis of variance (ANOVA) (α = 0.05) indicates that when the hot splitless is used most compounds are subjected to matrix-induced chromatographic response enhancement. Furthermore, with the pulsed splitless, a decrease in the number of compounds with matrix-induced chromatographic response enhancement was found, approximately 20% compared to the classic hot splitless. Finally, a remarkable decrease in matrix-induced effects was found when cold splitless mode was used, since there was up to 55% reduction in the compounds, relative to traditional hot splitless, that showed statistical differences between responses in matrix-free standards and matrix-matched standards. Conclusions: It was found that the use of conventional hot splitless and pulsed splitless modes caused matrix-induced effects in more than 70% of the studied compounds. In addition, the results indicate that for most compounds there is an inverse relationship between matrix-induced chromatographic response enhancement and the volume of injection.

Estilos ABNT, Harvard, Vancouver, APA, etc.

32

Isoherranen, Nina, e Stefan Soback. "Chromatographic Methods for Analysis of Aminoglycoside Antibiotics". Journal of AOAC INTERNATIONAL 82, n.º 5 (1 de setembro de 1999): 1017–45. http://dx.doi.org/10.1093/jaoac/82.5.1017.

Texto completo da fonte

Resumo:

Abstract Aminoglycosides are antimicrobial agents used frequently in treatment of human and animal diseases caused by aerobic, gram-negative bacteria. Because of the toxicity of these compounds, considerable effort has been attributed to analysis of aminoglycoside content in drug preparations, in serum and urine specimen in therapeutic drug monitoring, and in edible animal tissues in residue control. The present review emphasizes the analytical problems associated with aminoglycoside analysis. Screening methods based on microbiological and immunological procedures were briefly discussed. Gas chromatography and especially high-performance liquid chromatography appeared the most widely used chemical methods for the analysis of these compounds. Due to lack of volatility, chromophore, and hydrophility of aminoglycosides, most methods applied derivatization for enhancement of their chromatographic characteristics. The applicability and advantages of the various derivatization procedures were discussed in detail. A wide variety of detection methods, including mass spectrometry have been used. Packed column separation was generally used for gas chromatographic separation. In liquid chromatography, reversed phase, ion pair, ion exchange, and normal phase separation has been employed. Mass spectrometry, as a detection method, was discussed in detail. Extraction procedures from body fluids and tissues were emphasized. The performance and the operational conditions of the methods were described and detailed information of the data was provided also in table format.

Estilos ABNT, Harvard, Vancouver, APA, etc.

33

Liu, Guo Bin, Ning Wang, Qing Hao Wang, Tian Shu Hai, Chuan Zong Zhao, Gui Bin Hu, Hong Zhi Jiao, Chuan Bing Bi e Hui Yan Cao. "Chromatographic Analysis of Oil-Based Electrical Equipment Discharge Failure". Applied Mechanics and Materials 602-605 (agosto de 2014): 2953–57. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.2953.

Texto completo da fonte

Resumo:

Discharge of failure was the fault type are likely to occur in transformers, bushings, transformers, and the extent of damage to the equipment is a serious and direct impact on the stable operation of the system, first introduced the principle and gas chromatographic analysis its test methods, then gas chromatography equipment discharge failure is how to judge the conduct described. Through the analysis of transformer oil chromatographic method can be found as early as possible transformers and other equipment inside the existence of latent failures, thus chromatography is to oversee and guarantee the safe operation of an important means of transformer.

Estilos ABNT, Harvard, Vancouver, APA, etc.

34

Gehrke, Charles W., Kenneth C. Kuo, Floyd E. Kaiser e Robert W. Zumwalt. "Analysis of Amino Acids by Gas Chromatography as the N-Trifluoroacetyl η-Butyl Esters". Journal of AOAC INTERNATIONAL 70, n.º 1 (1 de janeiro de 1987): 160–70. http://dx.doi.org/10.1093/jaoac/70.1.160.

Texto completo da fonte

Resumo:

Abstract This presentation describes amino acid analysis with the gas chromatographic method and experimental conditions using the N-trifluoroacetyl n-butyl ester derivatives; the study we describe here was undertaken to compare gas chromatographic (GC) and ion-exchange chromatographic (IEC) analyses of amino acids in hydrolysates of 9 diverse sample types to gain insight into effects of these 2 chromatographic methods of analysis on variation in amino acid results. Our study showed that values for samples prepared by 2 separate laboratories using the same procedure were generally in good agreement when all of the hydrolysates were analyzed by a single laboratory using a single method of analysis. To compare results from gas chromatography with those from ion-exchange chromatography analyses were performed by 2 different laboratories on the same hydrolysates and on different hydrolysates prepared by the same method by both laboratories. The data demonstrate that GC and IEC can be expected to yield essentially identical results when applied to the same hydrolysate. Agreement is so close that interlaboratory differences in hydrolysate preparation of the same sample contribute as much to variation in amino acid results as does the method of analysis, a fact which should be noted in planning collaborative studies.

Estilos ABNT, Harvard, Vancouver, APA, etc.

35

Shimada, K. "Modern chromatographic analysis of vitamins (Chromatographic Science Series, Vol. 60)". Journal of Chromatography A 633, n.º 1-2 (fevereiro de 1993): 320. http://dx.doi.org/10.1016/0021-9673(93)83171-n.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

36

Swanson, Steven P., Andrew M. Dahlem, Harold D. Rood, Louis-Marie Côte, William B. Buck e Takumi Yoshizawa. "Gas Chromatographic Analysis of Milk for Deoxynivalenol and Its Metabolite DOM-1". Journal of AOAC INTERNATIONAL 69, n.º 1 (1 de janeiro de 1986): 41–43. http://dx.doi.org/10.1093/jaoac/69.1.41.

Texto completo da fonte

Resumo:

Abstract A gas chromatographic method is described for the determination of deoxynivalenol (DON) and its metabolite DOM-1 in milk. Milk samples were extracted with ethyl acetate on a commercially available disposable extraction column, followed by hexane-acetonitrile partitioning. Final purification was accomplished on a reverse phase C-18 cartridge. The trimethylsilyl ether (TMS) derivatives of DON were prepared, chromatographed on an OV-17 column, and quantitated with an electron capture detector. Chromatography of the TMS derivatives of milk extracts was compared to that of the corresponding heptafluorobutyryl derivatives. The limit of detection using TMS derivatives was 1 ng/mL for both toxins with recoveries averaging 82% ± 9% at 2.5 and 10 ng/ mL milk for DON and 85% ± 6% at 10 ng/mL for DOM-1.

Estilos ABNT, Harvard, Vancouver, APA, etc.

37

Kholin, Andrey Yu, Svetlana V. Kurbatova e Margarita N. Zemtsova. "Comparative analysis of the various structures quinoline derivatives retention under RP HPLC". Butlerov Communications 63, n.º 8 (31 de agosto de 2020): 31–39. http://dx.doi.org/10.37952/roi-jbc-01/20-63-8-31.

Texto completo da fonte

Resumo:

The study results of the structure and physicochemical parameters effect of various quinoline derivatives on their retention under conditions of reversed-phase high-performance liquid chromatography are presented. It is shown that since the establishment of the relationship between the structure of a substance and its properties is still one of the most important problems of modern chemistry and materials science, chromatography is a very convenient and effective method for obtaining the information necessary for this. To establish the relationship between the structure and sorption characteristics of substances, on the one hand, the parameters of the electronic structure of sorbate molecules, their hydrophobic properties, quantum-chemical, topological and other physicochemical characteristics of organic compounds are used, as well as various computer programs and computer modeling methods that make it possible to analyze and to compare the numerous data on the chromatographic retention of compounds of various chemical nature, on the other. At the same time, for the final conclusions about the possibility of using the obtained dependences and correlations for assessing and predicting the properties of new compounds, a significant sample of compounds of various compositions is required, with the use of which the corresponding "structure – property" relationships are obtained. By now, reference books and computer databases on the chromatographic retention of organic compounds are known, containing information on a fairly large number of objects. However, these databases usually contain information predominantly about the retention of compounds under gas chromatography conditions. There are practically no corresponding libraries and databases for liquid chromatography, which is primarily due to the variety of liquid chromatographic systems differing both in the nature and composition of stationary phases and eluents, and in the chromatographic conditions. For the conditions of liquid chromatography, the possibility of using such schemes is complicated by the existence of a large number of interactions in the chromatographic system, due, first of all, to the presence of an active eluent. It is shown in this work that heterocyclic compounds are suitable models for these purposes, a feature of which is the possibility of modifying their properties by varying the structure within wide limits. In this work, the influence of the presence of heteroatoms, a change in the position of the same heteroatom in the main heterocyclic fragment, and the presence of functional groups and substituents of various natures on chromatographic retention under RP HPLC conditions were studied.

Estilos ABNT, Harvard, Vancouver, APA, etc.

38

Simion Beldean-Galea, Mihail, Florina-Maria Copaciu e Maria-Virginia Coman. "Chromatographic Analysis of Textile Dyes". Journal of AOAC INTERNATIONAL 101, n.º 5 (1 de setembro de 2018): 1353–70. http://dx.doi.org/10.5740/jaoacint.18-0066.

Texto completo da fonte

Resumo:

Abstract The textile industry uses many raw materials (natural and synthetic dyes and fibers) and different dyeing techniques that can be considered important pollutants with a negative impact on the environment (toxic working conditions, discharged wastewater, and contamination). Although synthetic dyes are intensively used, offer a wide range of colors and hues and properties of adhesion, longevity, and resistance to sunshine and chemical processes, and are cost-effective, they have begun to be restricted by many textile producers because they are nonbiodegradable and have toxic, carcinogenic, and mutagenic effects that generate some imbalances in plant, animal, and human life. Natural dyes of plant and animal origin exhibit very good tolerance to washing, rubbing, and light and are biodegradable and nontoxic; these properties have led to a call for the renewed use of these dyes. Modern analytical techniques (solid-phase extraction, spectrophotometry, HPLC, HPTLC, capillary electrophoresis) with different spectroscopy (UV-Vis, diode-array detection, pulsed amperometric detection) and/or MS/tandem mass spectrometry detectors have an important role in the textile industry in obtaining essential information about dyeing techniques, material origin, historical trade routes of ancient textiles, and environmental pollution. For this purpose, isolation, separation, and quantification methods of natural and synthetic textile dyes from various matrices (ancient and modern fabrics, water, biota, etc.) are presented.

Estilos ABNT, Harvard, Vancouver, APA, etc.

39

KISHIKAWA, Naoya. "Derivatization Techniques for Chromatographic Analysis". Analytical Sciences 34, n.º 10 (10 de outubro de 2018): 1109–10. http://dx.doi.org/10.2116/analsci.highlights1810.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

40

Vimalasiri, P. A. D. T., R. P. Burford e J. K. Haken. "Chromatographic Analysis of Elastomeric Polyurethanes". Rubber Chemistry and Technology 60, n.º 3 (1 de julho de 1987): 555–77. http://dx.doi.org/10.5254/1.3536140.

Texto completo da fonte

Resumo:

Abstract Both alkali and acid fusion reactions can be used to cleave polyurethane polymers successfully. Fusion reaction rates are much faster than conventional aqueous alkali or acid fusion methods. Separation of fragments could be carried out using the liquid-liquid extraction procedures described. After quantitative and qualitative analysis of fragments using GC, SEC, and HPLC, chemical structure of the polymer can be established. Although the work described uses only elastomeric polyurethanes for the development of the analytical schemes, these schemes can be used to analyze other types of polyurethanes such as “Spandex” fibers, adhesive coating films, and plastics. The procedures described have also been used for the analysis of polyamide resins which are condensation products.

Estilos ABNT, Harvard, Vancouver, APA, etc.

41

Ahmad, Sayeed, MasoodShah Khan, Rabea Parveen, Kshipra Mishra e Rajkumar Tulsawani. "Chromatographic analysis of wheatgrass extracts". Journal of Pharmacy and Bioallied Sciences 7, n.º 4 (2015): 267. http://dx.doi.org/10.4103/0975-7406.168023.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

42

Stirbet, Daniela, Simona-Carmen Litescu e Gabriel-Lucian Radu. "Chromatographic analysis of immobilized cefotaxime". Journal of the Serbian Chemical Society 79, n.º 5 (2014): 579–86. http://dx.doi.org/10.2298/jsc130821008s.

Texto completo da fonte

Resumo:

The aim of the present work was to widen the application of an in-house developed fast, flexible and sensitive high performance liquid chromatography (HPLC) method to the assessment of cefotaxime sodium from aqueous samples. The method was applied to establish the release profile of cefotaxime sodium immobilised in MCM-41 nanoparticles using pH controlled release in aqueous medium. The analytical method proved to be sensible, repeatable (RSD < 1.5 %) and reproducible (RSD < 1 %) in the concentration range studied (0.01-10 ?g?mL-1), limit of detection and limit of quantification were 0.036 and 0.12 ?g?mL-1 respectively, suitable for the analysis of release of a single active ingredient, having a short analysis time (10 minutes).

Estilos ABNT, Harvard, Vancouver, APA, etc.

43

LIU, Yujian, Fuyou DU, Zhimin LIU, Xiaoxi SI e Zhigang XU. "Tandem technologies in chromatographic analysis". Chinese Journal of Chromatography 36, n.º 9 (2018): 842. http://dx.doi.org/10.3724/sp.j.1123.2018.04015.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

44

Iwasaka, M., e S. Ueno. "Liquid Chromatographic Analysis of Magnetophoresis". Journal of the Magnetics Society of Japan 21, n.º 4_2 (1997): 741–44. http://dx.doi.org/10.3379/jmsjmag.21.741.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

45

Katz, Elena, e D. Thorburn Burns. "Quantitative analysis using chromatographic techniques". Analytica Chimica Acta 215 (1988): 360–61. http://dx.doi.org/10.1016/s0003-2670(00)85302-7.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

46

Anderson, Jeffrey E. "Chromanal: Interactive chromatographic analysis software". Journal of Chemical Education 66, n.º 8 (agosto de 1989): A198. http://dx.doi.org/10.1021/ed066pa198.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

47

Tjaden, U. R., e E. A. De Bruijn. "Chromatographic analysis of anticancer drugs". Journal of Chromatography B: Biomedical Sciences and Applications 531 (outubro de 1990): 235–94. http://dx.doi.org/10.1016/s0378-4347(00)82286-0.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

48

Compton, Bruce Jon, e Lotte Kreilgaard. "Chromatographic analysis of therapeutic proteins". Analytical Chemistry 66, n.º 23 (dezembro de 1994): 1175A—1180A. http://dx.doi.org/10.1021/ac00095a001.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

49

Hammond, Eugene W. "Chromatographic techniques for lipid analysis". TrAC Trends in Analytical Chemistry 8, n.º 8 (setembro de 1989): 308–13. http://dx.doi.org/10.1016/0165-9936(89)85066-6.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

50

Heftmann, Erich. "Quantitative analysis using chromatographic techniques". Journal of Chromatography A 403 (janeiro de 1987): 394–95. http://dx.doi.org/10.1016/s0021-9673(00)96386-6.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Oferecemos descontos em todos os planos premium para autores cujas obras estão incluídas em seleções literárias temáticas. Contate-nos para obter um código promocional único!