Results 11 to 20 of about 57,188 (237)
Isotope ratio mass spectrometry application for environmental investigations [PDF]
E3S Web of Conferences, 2019 Stable isotope ratio mass spectrometry (IRMS) is a useful technique with a broad range of applications. Stable isotopes are important indicators of environmental changes (including climate), and can be used to explain the functioning of biogeochemical ...
Simonova Galina, Kalashnikova Daria
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Yankuang ceshi, 2021 BACKGROUND Before analyzing the carbon isotopes of n-alkanes by gas chromatography-gas isotope mass spectrometry (GC-IRMS), it is necessary to pre-separate and enrich n-alkanes and isoparaffins in saturated hydrocarbon samples. Whether the carbon isotope
DONG Hao-wei +6 more
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State-of-the-Art Analytical Approaches for Illicit Drug Profiling in Forensic Investigations
Molecules, 2022 In forensic chemistry, when investigating seized illicit drugs, the profiling or chemical fingerprinting of drugs is considered fundamental. This involves the identification, quantitation and categorization of drug samples into groups, providing ...
Reem Ahmed +2 more
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Continuous-flow isotope ratio mass spectrometry method for carbon and hydrogen isotope measurements on atmospheric methane [PDF]
Atmospheric Measurement Techniques, 2010 We describe a continuous-flow isotope ratio mass spectrometry (CF-IRMS) technique for high-precision δD and δ<sup>13</sup>C measurements of atmospheric methane on 40 mL air samples.
M. Brass, T. Röckmann
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Molecules, 2020 Precise tellurium (Te) isotope ratio measurement using mass spectrometry is a challenging task for many decades. In this paper, Te isotope ratio measurements using multi-collector inductively coupled plasma mass spectrometry (MC–ICP–MS) in terrestrial Te
Rajamanickam Murugan +2 more
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Isotope Calculation Gadgets: A Series of Software for Isotope-Tracing Experiments in Garuda Platform
Metabolites, 2022 Isotope tracing is a powerful technique for elucidating intracellular metabolism. Experiments utilizing this technique involve various processes, such as the correction of natural isotopes.
Nobuyuki Okahashi +3 more
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An analytical system for stable isotope analysis on carbon monoxide using continuous-flow isotope-ratio mass spectrometry [PDF]
Atmospheric Measurement Techniques, 2015 A fully automated system for the determination of δ13C and δ18O in atmospheric CO has been developed. CO is extracted from an air sample and converted into carbon dioxide (CO2) using the Schütze reagent.
S. L. Pathirana +3 more
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Research Progress on Stable Isotope Ratio Mass Spectrometry in Baijiu [PDF]
Shipin KexueBaijiu has a history of over 2 000 years. It is one of the world’s six major distilled spirits and is the national liquor of China. China has a vast territory, and regional differences in aroma types and brewing methods contribute to the wide diversity ...
XIE Yuxi, ZHAO Yaqi, HONG Yuhan, ZHAO Xuan, LEI Yi
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Stable Carbon Isotope Ratio (δ13C) Measurement of Graphite Using EA-IRMS System
Medžiagotyra, 2015 δ13C values in non-irradiated natural graphite were measured. The measurements were carried out using an elemental analyzer combined with stable isotope ratio mass spectrometer (EA-IRMS). The samples were prepared with ground and non-ground graphite, the
Andrius Garbaras +2 more
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Detection of Epitestosterone Doping by Isotope Ratio Mass Spectrometry [PDF]
Clinical Chemistry, 2002 AbstractBackground: Epitestosterone is prohibited by sport authorities because its administration will lower the urinary testosterone/epitestosterone ratio, a marker of testosterone administration. A definitive method for detecting epitestosterone administration is needed.Methods: We developed a gas chromatography-combustion-isotope ratio mass ...
Rodrigo, Aguilera +2 more
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