Готові списки джерел за темами / LA-ICP-MS/MS

Добірка наукової літератури з теми "LA-ICP-MS/MS"

Автор: Grafiati
Опубліковано: 8 червня 2024

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  2. Дисертації
  3. Книги
  4. Частини книг
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  6. Звіти організацій

Статті в журналах з теми "LA-ICP-MS/MS":

1

Gallo, Jenny M., and Jose R. Almirall. "Elemental analysis of white cotton fiber evidence using solution ICP-MS and laser ablation ICP-MS (LA-ICP-MS)." Forensic Science International 190, no. 1-3 (September 2009): 52–57. http://dx.doi.org/10.1016/j.forsciint.2009.05.011.

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2

Gäbler, Hans-Eike, Sönke Rehder, Andreas Bahr, Frank Melcher, and Simon Goldmann. "Cassiterite fingerprinting by LA-ICP-MS." Journal of Analytical Atomic Spectrometry 28, no. 8 (2013): 1247. http://dx.doi.org/10.1039/c3ja50106j.

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3

Choi, Sung Hwa, Jae Sung Kim, Ji Yeon Lee, Ji Suk Jeon, Ju Wan Kim, Richard E. Russo, Jhanis Gonzalez, et al. "Analysis of arsenic in rice grains using ICP-MS and fs LA-ICP-MS." J. Anal. At. Spectrom. 29, no. 7 (2014): 1233–37. http://dx.doi.org/10.1039/c4ja00069b.

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With rice being the main staple crop in Asian countries such as China, Korea and Japan, the detection of arsenic (As), an element known to be carcinogenic to humans, has been the topic of high public interest.
4

Brandl, Michael, and Christoph Hauzenberger. "Appendix 1. Supplementary LA-ICP-MS data." Archaeologia Austriaca 1 (2018): 550–65. http://dx.doi.org/10.1553/archaeologia102s550.

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5

Hutchinson, Robert W., and James A. Hutchinson. "Single-Cell Analysis by LA-ICP-MS." Transplantation 99, no. 11 (November 2015): 2237–38. http://dx.doi.org/10.1097/tp.0000000000000989.

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6

Pan, Zixiao, Wei Wei, and Fuhe Li. "LA ICP-MS in microelectronics failure analysis." Journal of Materials Science: Materials in Electronics 22, no. 10 (July 14, 2011): 1594–601. http://dx.doi.org/10.1007/s10854-011-0451-5.

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7

Becker, J. Sabine, M. Zoriy, Valderi L. Dressler, Bei Wu, and J. Susanne Becker. "Imaging of metals and metal-containing species in biological tissues and on gels by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS): A new analytical strategy for applications in life sciences." Pure and Applied Chemistry 80, no. 12 (January 1, 2008): 2643–55. http://dx.doi.org/10.1351/pac200880122643.

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Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) has become established as a very efficient and sensitive trace, ultratrace, and surface analytical technique in the life sciences. We have developed a new analytical imaging technique using LA-ICP-MS to study element distribution in biological tissues. Nowadays, LA imaging ICP-MS using double-focusing sector field (LA-ICP-SFMS) or quadrupole-based mass spectrometers (LA-ICP-QMS) can be applied as an exciting tool providing new information on the pathophysiology, pharmacology, and toxicology of elements of interest in biological systems. The quantitative determination of elements (e.g., Cu, Fe, Zn, Se, and others) in biological tissues is of growing interest especially in brain research (e.g., for studying neurodegenerative diseases such as Alzheimer's or Parkinson's disease). LA-ICP-SFMS was employed to produce images of detailed regionally specific element distributions in thin tissue sections of different sizes (such as control human or rat brain tissues or tumor regions). In addition, imaging MS using LA-ICP-QMS was applied to study the uptake and transport of nutrient and toxic elements in plant tissues.Besides the quantitative imaging of essential and toxic elements in tissues, powerful analytical techniques are also required for the determination and characterization of phosphoproteins and metal-containing proteins within a large pool of proteins, after electrophoretic separation (e.g., blue native, BN and sodium dodecyl sulfate-polyacrylamide gel electrophoresis, SDS-PAGE) into 1D and 2D gels. LA-ICP-MS was used to detect metalloproteins in protein bands of 1D gels or protein spots separated after 2D gel electrophoresis (2D-GE). In addition to elemental determination by LA-ICP-MS, matrix-assisted laser desorption/ionization (MALDI)-MS was employed to identify metal-containing proteins. Recent progress will be discussed in applying LA-ICP-MS in the life sciences, including the imaging of thin slices of tissue and applications in proteome analysis in combination with MALDI-MS to investigate phosphoproteins and metal-containing proteins.
8

Popov, Daniil V. "Short communication: On the potential use of materials with heterogeneously distributed parent and daughter isotopes as primary standards for non-U–Pb geochronological applications of laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS)." Geochronology 4, no. 1 (June 15, 2022): 399–407. http://dx.doi.org/10.5194/gchron-4-399-2022.

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Abstract. Many new geochronological applications of laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) have been proposed in recent years. One of the problems associated with this rapid growth is the lack of chemically and isotopically homogeneous matrix-matched primary standards to control elemental fractionation during LA-ICP-MS analysis. In U–Pb geochronological applications of LA-ICP-MS this problem is often addressed by utilising matrix-matched primary standards with variable chemical and isotopic compositions. Here I derive a set of equations to adopt this approach for non-U–Pb geochronological applications of LA-ICP-MS.
9

Frei, Dirk, Julie A. Hollis, Axel Gerdes, Dan Harlov, Christine Karlsson, Paulina Vasquez, Gerhard Franz, Leif Johansson, and Christian Knudsen. "Advanced in situ geochronological and trace element microanalysis by laser ablation techniques." Geological Survey of Denmark and Greenland (GEUS) Bulletin 10 (November 29, 2006): 25–28. http://dx.doi.org/10.34194/geusb.v10.4884.

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Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) was developed in 1985 and the first commercial laser ablation systems were introduced in the mid 1990s. Since then, LA-ICP-MS has become an important analytical tool in the earth sciences. Initially, the main interest for geologists was in its ability to quantitatively determine the contents of a wide range of elements in many minerals at very low concentrations (a few ppm and below) with relatively high spatial resolution (spot diameters of typically 30–100 μm). The potential of LA-ICP-MS for rapid in situ U–Th–Pb geochronology was already realised in the early to mid 1990s. However, the full potential of LA-ICP-MS as the low-cost alternative to ion-microprobe techniques for highly precise and accurate in situ U–Th–Pb age dating was not realised until the relatively recent advances in laser technologies and the introduction of magnetic sectorfield ICP-MS (SF-ICPMS) instruments. In March 2005, the Geological Survey of Denmark and Greenland (GEUS) commissioned a new laser ablation magnetic sectorfield inductively coupled plasma mass spectrometry (LA-SF-ICP-MS) facility employing a ThermoFinnigan Element2 high resolution magnetic sectorfield ICP-MS and a Merchantek New Wave 213 nm UV laser ablation system. The new GEUS LA-SF-ICP-MS facility is widely used on Survey research projects in Denmark and Greenland, as well as in collaborative research and contract projects conducted with partners from academia and industry worldwide. Here, we present examples from some of the these ongoing studies that highlight the application of the new facility for advanced geochronological and trace element in situ microanalysis of geomaterials. The application of LASF-ICP-MS based in situ zircon geochronology to regional studies addressing the Archaean geology of southern West Greenland is presented by Hollis et al. (2006, this volume).
10

Grottoli, Andréa G., Kathryn A. Matthews, James E. Palardy, and William F. McDonough. "High resolution coral Cd measurements using LA-ICP-MS and ID-ICP-MS: Calibration and interpretation." Chemical Geology 356 (October 2013): 151–59. http://dx.doi.org/10.1016/j.chemgeo.2013.08.024.

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Статті в журналах Дисертації

Дисертації з теми "LA-ICP-MS/MS":

1

Izmer, Andrei. "Method development using ICP-MS and LA-ICP-MS and their application in environmental and material science." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=981659799.

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2

Far, Johann. "Contribution à la caractérisation du sélénométabolome de levures enrichies en sélénium de la chromatographie liquide multidimensionnelle et la spectrométrie de masse ICP MS (Inductively Coupled Plasma Mass Spectrometry), ICP MS multicollecteur et électrospray MS/MS." Pau, 2010. http://www.theses.fr/2010PAUU3004.

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La levure enrichie en sélénium (Saccharomyces cerevisiae) est l’une des formes de supplémentation alimentaire les plus appréciée chez l’homme et l’animal, notamment pour ses propriétés anti-cancérigènes potentielles. Les travaux de cette thèse ont contribué principalement à la caractérisation globale du selenométabolome (l’ensemble des métabolites de faibles poids moléculaires contenant du sélénium). C’est grâce aux développements et à l’utilisation de chromatographies liquides multidimensionnelles orthogonales couplées à l’ICP MS et à l’ESI MSn à haute résolution que ce travail de recherche a été rendu possible. L’approche méthodologique ainsi mise au point a permis de réaliser des empreintes moléculaires du sélénométabolome et de compléter la liste des composés identifiés (plus de 50, représentant la liste la plus complète à ce jour). Ces résultats ont également permis d’améliorer la compréhension des voies métaboliques utilisées lors de l’utilisation du sélénium par la levure. De plus, l’utilisation de la signature isotopique du sélénium déterminée par ICP MS multicollecteur en association avec les empreintes moléculaires du sélénométabolome représente ici un outil original et de choix permettant la discrimination des levures enrichies en fonction de leurs origines
Selenium-rich yeast (Saccharomyces cerevisiae) is the most popular form of supplemented selenium because of its putative anticancer properties. This thesis offers a contribution to the characterization of selenometabolome (the entirety of the low molecular weight selenium-containing metabolites) owing to the development of multidimensional liquid chromatography with parallel detection by ICP MS and electrospray high-resolution MSn. The developed methods permitted to obtain a selenometabolome’s fingerprint including the identity of over 50 selenium metabolites, the most exhaustive list so far, and to obtain a deeper insight into the Se metabolic pathways in yeast. Besides, isotopic signatures obtained by multicollector ICP MS associated with the selenometabolome fingerprint allowed the discrimination of Se-rich yeast samples according to their origin
3

Bertotti, Anelise Losangela. "Lu-Hf em zircão por LA-MC-ICP-MS." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/56296.

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Atualmente a metodologia de Lu-Hf é um dos métodos mais utilizados na geocronologia, principalmente nas análises in situ em zircão por LA-ICP-MS. O interesse na aplicação desta metodologia, quando se dispõe de um sistema como o LA-ICP-MS, deve ser consignado à relativa simplicidade, sensibilidade e rapidez da análise. A alta concentração e a baixa mobilidade do Hf no zircão propiciam razões isotópicas e idades modelos bastante precisas, que podem subsidiar importantes inferências não só quanto à idade de extração mantélica, mas também quanto à sua possível história evolutiva, proveniência e estudos afins. Assim, o projeto de tese foi elaborado com base nos principais objetivos, o aprendizado, a implementação e a aplicação da metodologia de Lu-Hf em zircão por ICP-MS. Zircões de três diferentes áreas, previamente datados pela metodologia U-Pb, foram analisados: Anortosito de Capivarita (Brasil), Ofiolito de Aburrá (Colômbia) e a Bacia de Camamu (Brasil). As análises foram feitas utilizando equipamentos como o ICP-MS Neptune (ThermoFinnigan), e os lasers Excimer 193 nm (ArF, GeoLas) e o 213 UP (Nd:YAG, New Wave). O ofiolito estudado consiste de rochas máficas e ultramáficas. Análises de 12 grãos revelaram Hf(t) entre +2,01 e +5,35, enquanto as idades modelo TDM resultaram valores em um intervalo entre 1,15 e 1,44 Ga, sugerindo a presença de um magma juvenil com possível contaminação crustal e forte afinidade com as rochas da Província Rondoniana - San Ignacio. Zircões magmáticos e metamórficos do Anortosito de Capivarita, localizado na porção NE do Escudo Sul-Rio-Grandense, fizeram parte de um estudo de comparação para verificar a reprodutibilidade dos dados obtidos pela metodologia de Lu-Hf desenvolvida no LGI. As análises foram feitas primeiramente no LGI-UFGRS (Brasil) e depois no MAFIIC-MUN (Canadá). Os resultados dos dois laboratórios mostraram boa reprodutibilidade, as idades TDM e os valores de Hf obtidos foram concordantes dentro dos erros experimentais. Estes resultados forneceram informações sobre a proveniência do anortosito e sugeriram uma fonte juvenil para a fusão com algum grau de contaminação crustal Paleoproterozóica. A Bacia de Camamu está relacionada ao rompimento do Gondwana e pertence ao grupo de bacias sedimentares da margem leste brasileira. Zircões detríticos dos Grupos Brotas e Almada, relacionados às fases pré-rifte e rifte da bacia, foram analisados por U-Pb e Lu-Hf. No Grupo Brotas, 70% dos zircões analisados são de idade Cambriana-Vendiana, provenientes do Orógeno Araçuaí- Congo Ocidental levando em conta as medidas de paleocorrente de S-SW para NNE. No Grupo Almada, as principais fontes dos zircões são Paleoproterozóica e Arqueana, de proveniência direta do embasamento adjacente a Oeste da Bacia de Camamu, consistente com as medidas de paleocorrente de oeste para leste das unidades estudadas. Os zircões paleoproterozóicos e arqueanos analisados, mesmo os Neoproterozóicos e os Eopaleozóicos mostram um forte componente crustal retrababalhado com menor contribuição de crosta juvenil. Contudo, a metodologia de Lu-Hf por LA-ICP-MS aplicada em zircões de diferentes áreas mostrou o potencial em fornecer dados precisos e confiáveis para estudos de proveniência e de crescimento crustal, de modo a redimensionar cada vez mais a geocronologia.
Currently the methodology of Lu-Hf is one of the most widely used in geochronology, especially in in situ analysis in zircon by LA-ICP-MS. The interest in the application of this methodology, when it has a system like LA-ICP-MS, should be consigned to relative simplicity, sensitivity and speed of analysis. The high concentration and low mobility of Hf in zircon, provide isotopic ratios and model ages highly accurate that can support not only important inferences about the age of mantle extraction, but also as to its possible evolutionary history, provenance and related studies. Thus, the thesis project was elaborated based on main objectives, learning, implementation and application of Lu-Hf methodology in zircon by ICP-MS. Zircons from three different areas, previously dated by U-Pb method, were analyzed: Capivarita Anorthosite (Brazil), Aburrá Ophiolite (Colombia) and Camamu Basin (Brazil). The Lu-Hf in situ analyses were performed using equipments such as Neptune ICP-MS (ThermoFinnigan), and lasers Excimer 193 nm (ArF, GeoLas) and UP 213 (Nd: YAG, New Wave). The studied ophiolite consists of ultramafic and mafic rocks. Analyses of 12 grains revealed Hf(t) between +2.01 and +5.35, while the TDM model ages values resulted in a range between 1.15 and 1.44 Ga, suggesting the presence of a juvenile magma with possible crustal contamination and strong affinity with the rocks of the Rondonian-San Ignacio Province. Magmatic and metamorphic zircons from Capivarita Anorthosite, located in the NE portion of the Sul-Rio-Grandense Shield, were part of a comparison study to verify the reproducibility of obtained data by Lu-Hf methodology developed in the LGI. Analyses were performed first in the LGI-UFGRS (Brazil) and then at MAFIIC-MUN (Canada). Results from both laboratories show good reproducibility, TDM ages and Hf(t) values obtained are in agreement within experimental errors. These results provide information on the origin of anorthosite and suggested a juvenile source for the melt with some degree of Paleoproterozoic crustal contamination. Camamu Basin is related to the breakup of Gondwana and belongs to the group of sedimentary basins on the eastern Brazilian margin. Detrital zircons of Brotas and Almada Groups, related to the pre-rift and rift phases of the basin, were analyzed by U-Pb and Lu-Hf. In Brotas Group, 70% of analyzed zircons are Vendian-Cambrian age, from the Araçuaí-West Congo Belt taking into account the paleocurrent measurements from S-SW to N-NE. In Almada Group, the main sources of the zircons are Paleoproterozoic and Archean, with direct provenance from the basement adjacent to West Camamu Basin which is consistent with the paleocurrent measurements from west to east of the studied units. The analyzed Paleoproterozoic and Archean zircons, even the Neoproterozoic and Eopaleozoic show a strong reworked crustal component with small contribution of juvenile crust. However, the Lu-Hf methodology by LA-ICP-MS applied to zircons from different areas showed the potential to provide accurate and reliable data for provenance and crustal growth studies in order to resize increasingly the geochronology.
4

Belissont, Rémi. "Germanium and related elements in sulphide minerals : crystal chemistry, incorporation and isotope fractionation." Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0049/document.

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Le germanium est un métalloïde « stratégique » dans l’industrie high-tech, notamment pour la transition énergétique et le secteur des communications. Étant distinctement sidérophile, lithophile, chalcophile et organophile, le Ge possède un fort potentiel comme traceur géochimique. Ces travaux de thèse visent à améliorer la compréhension de la géochimie du cycle du Ge et des facteurs qui contrôlent son incorporation dans les minéraux et les gisements métalliques. Les cibles de cette étude concernent le gisement filonien à Zn de Saint-Salvy (Massif Central, France), le gisement filonien à Cu de Barrigão (Ceinture pyriteuse ibérique, Portugal), et le gisement à Zn–Cu de Kipushi (R.D. Congo). Les porteurs de Ge les plus importants sont respectivement la sphalérite (jusqu’à 2580 ppm), la chalcopyrite (jusqu’à 5750 ppm) et la réniérite (5,0–9,1 %). Les résultats montrent qu’il existe une relation de premier ordre entre la concentration en Ge dans la sphalérite et le type de gisement. La spectroscopie XANES par rayonnement synchrotron met en évidence la présence de Ge4+ en site tétraédrique dans les sulfures analysés. Les corrélations élémentaires observées dans la sphalérite et la chalcopyrite suggèrent une incorporation du Ge par co-substitutions, e.g., 3Zn2+ ↔ Ge4+ + 2(Cu,Ag)+ et 3Fe3+ ↔ 2Ge4+ + Cu+, ou via la création de lacunes cristallographiques, e.g., 2Zn2+ ↔ Ge4+ + ?. La corrélation positive δ74Ge–[Ge]ZnS des sphalérites de Saint-Salvy indiquerait que coefficient de partage (KdGe) augmenterai avec T. Les compositions isotopiques δ74Ge des sulfures étudiés varient de –5,72‰ à +3,67‰. Les compositions légères mesurées dans les gisements de Saint-Salvy et Barrigão semblent liées à des variations de température des fluides (basse à moyennes T) lors de l’incorporation de Ge en système ouvert, alors que la tendance marquée vers les compositions isotopiques lourdes à Kipushi indiquerait un fractionnement de Rayleigh
Germanium is a critical metalloid in many high-tech industries, especially for the energy transition and the communication sector. Being distinctly siderophile, lithophile, chalcophile and organophile, Ge can be a particularly useful geochemical tracer. This thesis aims at understanding the Ge geochemistry and the factors controlling its concentration in Ge-bearing minerals and ore deposits. Three contrasted Ge-bearing deposits were studied, the Saint-Salvy Zn vein-type deposit, French Massif Central, the Barrigão Cu vein-type deposit, Iberian pyrite belt, Portugal, and the Kipushi Zn–Cu carbonate-hosted deposit, Central African copper-belt, D.R. Congo. The most important Ge-bearing minerals are sphalerite (up to 2580 ppm Ge), chalcopyrite (up to 5750 ppm Ge), and renierite (5.0–9.1 wt.% Ge). The results show a first order relation between the Ge content and the deposition temperature. Synchrotron-based XANES spectroscopy showed that Ge4+ occur in tetrahedral sites in the studied sulphides. Element correlations suggest that Ge is chiefly incorporated in sphalerite and chalcopyrite through coupled substitutions, e.g., 3Zn2+ ↔ Ge4+ + 2(Cu,Ag)+ and 3Fe3+ ↔ 2Ge4+ + Cu+, respectively, or via the creation of lattice vacancies, e.g., 2Zn2+ ↔ Ge4+ + ?. The positive δ74Ge–Ge content correlation observed in sphalerite from Saint-Salvy could indicate that Ge partition coefficient (KdGe) increases with temperature. Ge isotopes in sulphides yield δ74Ge values spanning from –5.72‰ to +3.67‰. The light δ74Ge compositions of Saint-Salvy and Barrigão ores appear to be related to variations in low to moderate fluid temperatures during Ge uptake in open system (e.g., fluid cooling), while the trend towards heavy δ74Ge compositions observed at Kipushi likely translates a Rayleigh fractionation effect during ore formation in closed system, associated with significant fluid modification
5

Casiot, Corinne. "Développement de techniques analytiques couplées (HPLC-ICP-MS et EC-ICP-MS) pour la spéciation de métalloi͏̈des (arsenic, sélénium, antimoine et tellure)." Pau, 1999. http://www.theses.fr/1999PAUU3026.

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Les éléments traces et en particulier les métalloïdes tels que l'arsenic, le sélénium, l'antimoine et le tellure peuvent se présenter dans l'environnement sous différentes formes chimiques, qui conditionnent leur toxicité, leur biodisponibilité et leur capacité à migrer. Ce travail présente le développement de deux techniques analytiques de spéciation multiélémentaire, associant une technique séparative (chromatographie liquide, électrophorèse capillaire) et un détecteur spécifique et très sensible, l'ICP-MS. La chromatographie d'échange d'anions couplée à l'ICP-MS a permis la séparation simultanée de onze espèces organiques et inorganiques de l'arsenic (As III, As V, MMa, DMa), du sélénium (Se IV, Se VI, SeCyst, SeMet), de l'antimoine (Sb V) et du tellure (Te IV et Te VI). Les limites de détection, comprises entre 0,02 et 3 g/l, ont permis l'analyse d'extraits de sols et de tissus biologiques (poisson, levures). Plusieurs protocoles ont été testés pour l'extraction du sélénium contenu dans une levure. Différentes classes de composés séléniés (protéines, acides aminés, composés inorganiques) ont été mises en évidence par chromatographie d'exclusion stérique. L'adénosyl-séléhomocystéine a été identifiée par spectrométrie de masse electrospray. Un couplage entre l'électrophorèse capillaire (EC) et l'ICP-MS a été développé. Trois nébuliseurs ont été testés pour l'interface : le Babington, le MCN-100 et le Micromist. Ce dernier a permis des séparations reproductibles et une amélioration de la sensibilité par rapport à l'UV. Les limites de détection sont comprises entre 6 et 58 g/l pour les espèces étudiées de As, Se, Sb et Te. L'analyse d'extraits de sols a montré les possibilités de cette technique pour l'analyse d'échantillons réels.
6

Petersen, Jassin. "Development of paleo-oxygenation proxies : new insights into Mn/Ca ratios and pore patterns of benthic foraminiferal tests." Thesis, Nantes, 2017. http://www.theses.fr/2017NANT4022/document.

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L’objectif principal de cette thèse était de comprendre comment la variabilité temporelle et spatiale de l’oxygénation de l’eau de fond est enregistrée dans le test des foraminifères benthiques, à travers le rapport Mn/Ca et les paramètres des pores. Pour atteindre cet objectif, Ammonia tepida, un groupe d’espèces pseudocryptiques, du Grevelingenmeer (Pays-Bas) a été principalement étudié. A ce site, le gradient bathymétrique est accompagné par une augmentation de la durée et de l’intensité de l’hypoxie/anoxie saisonnière qui influence indirectement le rapport Mn/Ca et directement la porosité d’A. tepida. Notre étude de la Zone à Oxygène Minimum de la Mer d’Arabie suggère la présence d’un important biais diagénétique dans le signal Mn/Ca lors de la transition d’un foraminifère vivant vers un test fossile. En conclusion de cette thèse, la composition Mn/Ca d’un test des foraminifères benthiques dans notre zone d’étude semble être influencée par trois facteurs temporelles 1) l’oxygénation du milieu benthique et la position de la zone redox enrichie en Mn2+ dans l’eau interstitielle, 2) l’activité des bactéries câblées et 3) la période de calcification, ainsi que par trois facteurs spatiaux qui déterminent la position du foraminifère par rapport à la zone de Mn2+ lors de la calcification 4) le microhabitat, 5) la migration verticale des foraminifères et 6) la bioturbation de la macrofaune. Dans le Grevelingenmeer, la porosité d’A. tepida montre une relation avec l’oxygénation. Le couplage entre porosité et oxygénation semble être direct, une plus grande porosité permettant des échanges de gaz plus intensifs. Au contraire, la relation entre le rapport Mn/Ca et l’oxygénation serait plus indirecte, puisque celle-ci est également influencée par l’activité microbienne. L’utilisation simultanée de ces deux proxies totalement indépendants nous semble prometteuse, spécialement parce que ces proxies réagissent à différentes échelles de temps
The main objective of this thesis was to investigate how the temporal and spatial variability of bottom water oxygenation is recorded in the benthic foraminiferal test, by the Mn/Ca ratio, and by the pore parameters. To achieve this objective, Ammonia tepida, a group of pseudocryptic species, of the Lake Grevelingen (Netherlands) was mainly studied. At this site, the depth gradient is accompanied by an increase in duration and intensity of seasonal hypoxia/anoxia which indirectly influences the Mn/Ca ratio and directly the porosity of A. tepida. Our study of the Oxygen Minimum Zone in the Arabian Sea suggests the presence of a significant diagenetic effect during the transition of a Mn/Ca signal from a living foraminifer to a fossil signal. In conclusion of this PhD research, the Mn/Ca signal of a benthic foraminiferal test seems to be influenced by three temporal factors: 1) the oxygenation of the benthic ecosystem and the position of the Mn2+ zone in the interstitial water, 2) the cable bacteria activity, and 3) the period of calcification, as well as by three spatial factors which determine the position of the foraminifer with respect to the Mn2+ zone during calcification 4) the microhabitat, 5) the vertical migration of the foraminifer and 6) the bioturbation of macrofauna. In the Lake Grevelingen, the porosity of A. tepida shows a relationship with oxygenation of the benthic ecosystem. The coupling between porosity and oxygenation could be rather direct, a greater porosity allowing more intensive gas exchanges. In contrast, the relationship between the Mn/Ca ratio and the oxygenation would be more indirect, being influenced in particular by the microbial activity. The simultaneous use of these two totally independent proxies seems promising, especially because these proxies react at different time scales
7

Douglas, David N. "Development of a high speed, high efficiency LA-ICP-MS interface." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12164.

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Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) is now a well established analytical technique used to sample solid materials and determine their elemental composition. Two areas that are becoming increasingly important, and for which LA-ICP-MS is a key tool, are bio-imaging and the analysis of micro-particulates. However, current instrumental designs limit the practicality of the technique for these applications. This study investigates the development of a high speed, high efficiency LA-ICP-MS interface through modelling of the flow dynamics of a newly designed laser ablation cell and experimental investigation of single laser pulse response. Through this work the Sniffer-Dual Concentric Injector interface was realised. This interface reduced particle residence times within the laser cell and transport tubing. The interface was also used to investigate turbulence related aerosol dispersion within the ICP and potential designs to overcome this. The resulting design yields an interface with improved sensitivity and reduced aerosol dispersion such that a lower limit of detection is achieved, important when considering the mass of analyte in a single cell or micro-particulate, compared to existing designs. Thus the interface can be used to improve image spatial resolution as the ablation spot size, and thus pixel information, can be reduced; and also reduces total analysis time. The calibration technique Laser Ablation of a Sample In Liquid (LASIL) was also investigated as a means of calibration for solid samples. The investigation lead to the development of LASIL in a droplet, a technique that can be used to calibrate solid samples when a matrix matched standard is unavailable. The mechanism of the technique resulted in an improved laser-energy sample coupling efficiency and a reduction in the liquid to ablated mass ratio, thus decreasing sampling time. As the technique captures the ablated particulate in solution, post chemistry techniques can be used to remove analyte interferences.
8

Marillo, Sialer Estephany. "Chemistry with lasers." Revista de Química, 2017. http://repositorio.pucp.edu.pe/index/handle/123456789/123958.

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El número de aplicaciones de la energía laser en el campo científico crece día a día. Estas no solo se han extendido en los campos de química, física y ciencia de materiales, sino también en biología y medicina. Este artículo es una breve introducción a los principios fundamentales del funcionamiento del láser, así como a su aplicación en el campo de la química.
The number of applications of lasers in science is constantly growing, with applications stretching from chemistry, physics and materials science to biology and medicine. This article provides a short overview of the fundamentals of lasers and an introduction to the application of lasers and laser ablation in chemistry.
9

Llanos, Lorena Vanina. "Comparación de dos métodos (ICP-OES VS. ICP-MS) para la determinación de arsénico en agua." Bachelor's thesis, Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias, 2019. http://bdigital.uncu.edu.ar/13814.

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La determinación de arsénico en el agua de consumo humano es importante, ya que es un elemento que en algunas zonas es usual encontrarlo naturalmente y suele alcanzar valores que son tóxicos para la salud. Conociendo los valores de arsénicos presentes en el agua, permite tomar una decisión respecto al tratamiento de remediación a realizar para que se cumplan los límites permitidos por el Código Alimentario Argentino. Se pueden utilizar varios métodos de análisis, pero en este trabajo se propuso como objetivo, comparar dos métodos de ensayo: ICP-OES (Espectrometría de Emisión Óptica por Plasma de Acoplamiento Inductivo) e ICP-MS (Espectrometría de Masas por Plasma de Acoplamiento Inductivo), para determinar si difieren significativamente entre sí. Las muestras fueron tomadas en el departamento de Lavalle, provincia de Mendoza, ya que existen antecedentes de la existencia de altas concentraciones de arsénico en esta zona. Se analizaron 30 muestras de agua en el laboratorio Alex Stewart International Argentina S.A. por ambos métodos. Se pudo concluir que en todas las muestras de agua analizadas se hallaron niveles superiores al límite máximo de arsénico permitido en agua potable. Luego del análisis estadístico de los datos obtenidos, se determinó que ambos métodos no son significativamente comparables, debido a los diferentes límites de detección y rangos de trabajo de cada equipo. Con el ICP-MS se pueden analizar muestras de agua con menores concentraciones del analito y para concentraciones mayores el ICP-OES tiene mejor respuesta. Esto hace que el empleo de ambos métodos pueda aplicarse a rangos de concentración diferentes. Finalmente, se concluye que, en los intentos de ofrecer una propuesta superadora frente a los análisis clásicos existentes, para la determinación de arsénico en agua, las dos metodologías propuestas no pueden ser utilizadas indistintamente, sino solo dentro de sus rangos de concentración, de manera complementaria.
Fil: Llanos, Lorena Vanina. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias.
10

Gondonneau, Alexandra. "Développement et application des techniques ICP-MS et LA-ICP-MS à la caractérisation de l'or : circulation monétaire entre Orient et Occident dans l'Antiquité et au Moyen-Age." Orléans, 2001. http://www.theses.fr/2001ORLE2070.

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Pour déterminer la provenance de l'or, nous avons développé la spectrométrie de masse à plasma inductif, associée ou non, à l'ablation laser UV (LA-ICP-MS et ICP-MS) et défini les protocoles d'analyse afin de doser quantitativement un grand nombre d'éléments susceptibles de différencier les minerais d'or utilisés pour la fabrication des objets anciens. L'optimisation des paramètres liés à l'ICP-MS, à l'acquisition des données et au laser s'est effectuée en respectant un critère quasi non destructif : seuls des prélèvements de 1 à 3 ?g en analyse directe et de 2 mg en analyse liquide suffisent. L'analyse par activation protonique nous a permis de disposer de matériaux de référence et de vérifier, pour certains éléments, la validité des résultats obtenus : la technique LA-ICP-MS permet une approche surtout qualitative dans notre configuration tandis que la méthode ICP-MS permet de caractériser quantitativement l'or archéologique. L'analyse de monnaies d'or antiques, émises du VIe au IIIe s. Av J. -C. , de Crésus à Alexandre le Grand a conforté l'hypothèse de la réutilisation des trésors achéménides par ce dernier pour frapper son propre monnayage en Orient. En Macédoine, la différence de composition élémentaire des statères aux types de Philippe II et d'Alexandre permet une datation plus précise de certains exemplaires. Nos recherches sur l'or musulman monnayé du VIe au XIIe s. Ont permis de mieux cerner la circulation des métaux précieux en Orient, en Egypte et en Ifrîk'iyah. Au début des conquêtes, un or précédemment utilisé est recyclé pour les émissions orientales et africaines. Sous les Abbassides deux ors différents, un en Egypte et l'autre au Moyen-Orient sont utilisés et l'analyse des dinars fatimides confirme que l'or d'Egypte se différencie de l'or frappé en Ifrîk'iyah. Mais, c'est seulement vers le milieu du Xe s. Que ce légendaire or du Soudan ancien arrive en quantité suffisante pour frapper les monnaies musulmanes en Afrique du Nord et en Egypte.
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Книги з теми "LA-ICP-MS/MS":

1

Hubbard, Dale A. A paleogeochemical investigation of ferromanganese oxyhydroxides from the Mendocino Ridge using laser ablation inductively-coupled plasma mass spectrometry (LA ICP-MS). 1999.

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Частини книг з теми "LA-ICP-MS/MS":

1

Sylvester, Paul. "Laser Ablation Inductively Coupled Mass Spectrometer (LA ICP-MS)." In Encyclopedia of Scientific Dating Methods, 1–2. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-6326-5_75-1.

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2

Sylvester, Paul. "Laser Ablation Inductively Coupled Mass Spectrometer (LA ICP-MS)." In Encyclopedia of Scientific Dating Methods, 371–72. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-007-6304-3_75.

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3

Gratuze, Bernard. "Analysis of Vitreous Archaeological Materials by LA-ICP-MS." In Natural Science in Archaeology, 137–39. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49894-1_9.

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4

Xie, Xiande, and Ming Chen. "LA-ICP-MS Analysis of Trace Elements in Yanzhuang." In Yanzhuang Meteorite: Mineralogy and Shock Metamorphism, 223–37. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-0735-9_12.

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5

Carter, Alison K. "Determining the Provenience of Garnet Beads Using LA-ICP-MS." In Natural Science in Archaeology, 235–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49894-1_16.

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6

Dussubieux, Laure. "Analysis of Non-siliceous Archaeological Materials by LA-ICP-MS." In Natural Science in Archaeology, 91–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49894-1_6.

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7

Cocherie, Alain, and Michèle Robert. "LA-MC-ICP-MS Applied to U-PB Zircon Geochronology." In Mass Spectrometry Handbook, 675–705. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118180730.ch31.

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8

Reepmeyer, Christian, Wallace Ambrose, and Geoffrey Clark. "Contributions of LA-ICP-MS to Obsidian Sourcing in the Pacific." In Natural Science in Archaeology, 141–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49894-1_10.

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9

Dussubieux, Laure. "A Proficiency Test for LA-ICP-MS Laboratories Analyzing Ancient Glass." In Natural Science in Archaeology, 197–212. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49894-1_13.

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10

Iñañez, Javier G., Jeremy J. Bellucci, Juan Guillermo Martín, Richard Ash, William F. McDonough, and Robert J. Speakman. "Pb Isotopic Composition of Panamanian Colonial Majolica by LA-ICP-MS." In Natural Science in Archaeology, 343–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49894-1_19.

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Тези доповідей конференцій з теми "LA-ICP-MS/MS":

1

Rösel, Delia, and Thomas Zack. "LA-ICP-MS/MS single spot Rb-Sr dating." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.7153.

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2

Huang, Shiqiang, and Zhaoshan Chang. "In situ Rb-Sr dating of muscovite by LA-ICP-MS/MS." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.6297.

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3

Erofeieva, A. "Analytical Dating in Geological Science (LA-ICP-MS)." In 73rd EAGE Conference and Exhibition incorporating SPE EUROPEC 2011. Netherlands: EAGE Publications BV, 2011. http://dx.doi.org/10.3997/2214-4609.20149700.

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4

West, Nicholas, and C. Ashley Norris. "Mass Filter Integration For Aligned LA-ICP-MS." In Goldschmidt2023. France: European Association of Geochemistry, 2023. http://dx.doi.org/10.7185/gold2023.19524.

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5

Caron, Benoit, Benoit Dubacq, Benoit Villemant, Sarah Figowy, Giulia Del Manzo, Thomas Gyomlai, Agnes Cousin, Philippe Agard, Anne Le Friant, and Thomas Zack. "LA-ICP-MS/MS geological applications from volcanic halogens to the Mars2020 mission." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.4355.

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6

Zack, Thomas. "The untapped world of reaction gases with regards to LA-ICP-MS/MS." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.4245.

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7

Wu, Shitou, Yueheng Yang, and Hao Wang. "In situ Lu–Hf geochronology with LA-ICP-MS/MS analysis." In Goldschmidt2023. France: European Association of Geochemistry, 2023. http://dx.doi.org/10.7185/gold2023.14178.

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8

Huang, Shiqiang, Zhaoshan Chang, and Dieter Garbe-Schönberg. "IN SITU RB-SR DATING OF HYDROTHERMAL MINERAL DEPOSITS BY LA-ICP-MS/MS." In GSA Connects 2021 in Portland, Oregon. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021am-368915.

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9

Cruz-Uribe, Alicia, Joshua Garber, Grant Craig, Cemil Arkula, Bence Paul, and Claudia Bouman. "Single spot Rb-Sr isochron dating of micas by LA-MC-ICP-MS/MS." In Goldschmidt2023. France: European Association of Geochemistry, 2023. http://dx.doi.org/10.7185/gold2023.16752.

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10

Telouk, Philippe, Danae Guiserix, Grant Craig, Jeremy Martin, and Vincent Balter. "Strontium isotopes measurement of certified reference materials, igneous and biological apatite samples using the MC-ICP-MS Neoma in MS/MS mode and laser ablation (LA-MC-ICP-MS/MS)." In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.10832.

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Звіти організацій з теми "LA-ICP-MS/MS":

1

Denton, Joanna S., Travis Jay Tenner, Todd L. Williamson, Stephen Philip Lamont, and Robert Ernest Steiner. Plutonium particle analysis by LG-SIMS and LA-MC-ICP-MS for environmental safeguards. Office of Scientific and Technical Information (OSTI), May 2018. http://dx.doi.org/10.2172/1438129.

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2

Milidragovic, D., G. Beaudoin, and S. E. Jackson. In-situ trace element characterization of three gold reference materials using EPMA and LA-ICP-MS. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2016. http://dx.doi.org/10.4095/299097.

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3

Ebert, Chris, Daniel S. Zamzow, Eddie H. McBay, Debra A. Bostick, Stanley J. Bajic, David P. Baldwin, and R. S. Houk. Elemental and Isotopic Analysis of Uranium Oxide an NIST Glass Standards by FEMTOSECOND-LA-ICP-MIC-MS. Office of Scientific and Technical Information (OSTI), June 2009. http://dx.doi.org/10.2172/963980.

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4

Duran, Jonah, Mike Zach, Ezekial Unterberg, Kevin Woller, W. R. Wampler, Dmitry Rudakov, and David Donovan. Oak Ridge National Laboratory Official TM Cover: Development and Qualification of Tungsten Reference Materials for LA-ICP-MS. Office of Scientific and Technical Information (OSTI), September 2023. http://dx.doi.org/10.2172/2076212.

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5

Plouffe, A., D. Petts, I M Kjarsgaard, and M. Polivchuk. Laser ablation inductively coupled plasma mass spectrometry mapping of porphyry -related epidote from south-central British Columbia. Natural Resources Canada/CMSS/Information Management, 2023. http://dx.doi.org/10.4095/331671.

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The microscopic composition of thirteen samples of epidote related to porphyry Cu mineralization was mapped using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) at the Geological Survey of Canada. The objective of this research is to improve the indicator mineral method of mineral exploration in glaciated terrains by utilizing the trace element composition of epidote. Six bedrock samples from porphyry Cu deposits of south-central British Columbia (Gibraltar, Mount Polley and Woodjam), three bedrock samples from the Nicola Group located close (<2 km) from the intrusions host of porphyry mineralization and afar (12 km), and four epidote grains from two till samples, one at Gibraltar and a second one at Mount Polley, were analyzed. Backscattered electron (BSE) images and the LA-ICP-MS maps show an heterogeneous distribution of Fe and Al in epidote following complex and mottled patterns and consistent zoning typically with high Fe and low Al concentrations in the core progressing to low Fe and high Al concentrations in the rim. Trace elements are heterogeneously distributed in epidote following the Fe/Al zoning in some samples. Evidence of late infiltration of trace elements (e.g. Cu, Zn, and REE) along fractures in epidote is observed in some samples. The variability in epidote composition is thought to be related to the changing conditions during its crystallization including oxidation state, pH, oxygen fugacity, fluid composition, temperature and pressure. Multiple LA-ICP-MS spot analyses need to be conducted on this mineral to fully evaluate its composition as an indicator mineral of porphyry Cu mineralization.
6

Matte, S., M. Constantin, and R. Stevenson. Mineralogical and geochemical characterisation of the Kipawa syenite complex, Quebec: implications for rare-earth element deposits. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329212.

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The Kipawa rare-earth element (REE) deposit is located in the Parautochton zone of the Grenville Province 55 km south of the boundary with the Superior Province. The deposit is part of the Kipawa syenite complex of peralkaline syenites, gneisses, and amphibolites that are intercalated with calc-silicate rocks and marbles overlain by a peralkaline gneissic granite. The REE deposit is principally composed of eudialyte, mosandrite and britholite, and less abundant minerals such as xenotime, monazite or euxenite. The Kipawa Complex outcrops as a series of thin, folded sheet imbricates located between regional metasediments, suggesting a regional tectonic control. Several hypotheses for the origin of the complex have been suggested: crustal contamination of mantle-derived magmas, crustal melting, fluid alteration, metamorphism, and hydrothermal activity. Our objective is to characterize the mineralogical, geochemical, and isotopic composition of the Kipawa complex in order to improve our understanding of the formation and the post-formation processes, and the age of the complex. The complex has been deformed and metamorphosed with evidence of melting-recrystallization textures among REE and Zr rich magmatic and post magmatic minerals. Major and trace element geochemistry obtained by ICP-MS suggest that syenites, granites and monzonite of the complex have within-plate A2 type anorogenic signatures, and our analyses indicate a strong crustal signature based on TIMS whole rock Nd isotopes. We have analyzed zircon grains by SEM, EPMA, ICP-MS and MC-ICP-MS coupled with laser ablation (Lu-Hf). Initial isotopic results also support a strong crustal signature. Taken together, these results suggest that alkaline magmas of the Kipawa complex/deposit could have formed by partial melting of the mantle followed by strong crustal contamination or by melting of metasomatized continental crust. These processes and origins strongly differ compare to most alkaline complexes in the world. Additional TIMS and LA-MC-ICP-MS analyses are planned to investigate whether all lithologies share the same strong crustal signature.
7

Gao, J. F., S. E. Jackson, B. Dubé, D. J. Kontak, and S. De Souza. Genesis of the Canadian Malartic, Côté Gold, and Musselwhite gold deposits: insights from LA-ICP-MS element mapping of pyrite. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2015. http://dx.doi.org/10.4095/296636.

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8

Balkanska, Eleonora, Stoyan Georgiev, Alexandre Kounov, Takahiro Tagami, and Shigeru Sueoka. Fission-track Analysis Using LA-ICP-MS: Techniques and Procedures Adopted at the New Low-temperature Thermochronology Laboratory in Bulgaria. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, January 2021. http://dx.doi.org/10.7546/crabs.2021.01.13.

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9

Leybourne, M. I., J. M. Peter, M A Schmidt, D. Layton-Matthews, A. Voinot, and L. Mathieu. Geochemical evidence for a magmatic contribution to the metal budget of the Windy Craggy Cu-Co(±Zn) volcanogenic massive-sulfide deposit, northwestern British Columbia. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/328018.

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Volcanogenic massive-sulfide (VMS) deposits may have had metal contributions from magmatic degassing and leaching of footwall rocks. The Windy Craggy Cu-Co-Zn VMS deposit in northwestern British Columbia may include magmatic contributions, based on laser-ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) of fluid inclusions (enriched in Sb, Sn, and Bi) and lithogeochemistry. Sulfide-mineral trace-element abundances in the massive-sulfide orebody, underlying stockwork zone, gold zone, and altered and unaltered mafic rock and argillite were analyzed by LA-ICP-MS. Elevated Au, W, As, Bi, Sb, Se, Te, Tl, Ag, Co, and Mo contents occur within the gold and/or stockwork zones. Increasing 'magmatic metals' with increasing Co/Ni values suggest direct magmatic contribution to the deposit. Covariation of Co with these so-called 'magmatic elements' indicates that it, too, may be of magmatic origin, sourced via fluids exsolved from a crystallizing magma; however, evidence from the composition of rocks and sulfide minerals from Windy Craggy and other VMS deposits suggests that there is probably no meaningful distinction between hydrothermal leaching and direct magmatic contributions and that most - if not all - fluids that form VMS deposits should be termed 'magmatic-hydrothermal'.
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Schmidt, M. A., M. I. Leybourne, J. M. Peter, D. Petts, and D. Layton-Matthews. Fluid inclusion LA-ICP-MS and whole rock geochemical investigation of possible magmatic contributions to the giant Windy Craggy Besshi-type VMS deposit. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2019. http://dx.doi.org/10.4095/313651.

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