Usefulness of serum androgen isotope ratio mass spectrometry (IRMS) to detect testosterone supplementation in women.
Sign Up to like & getrecommendations! Published in 2022 at "Drug testing and analysis"
DOI: 10.1002/dta.3428
Abstract: The detection of testosterone intake is facilitated by monitoring the urinary steroid profile in the athlete biological passport. This technique can be used with confidence to identify target samples for isotope ratio mass spectrometry. Regrettably,… read more here.
Keywords: mass spectrometry; isotope ratio; detect testosterone; ratio mass ... See more keywords
Insights into the stable isotope ratio variability of hybrid grape variabilities: a preliminary study.
Sign Up to like & getrecommendations! Published in 2022 at "Journal of the science of food and agriculture"
DOI: 10.1002/jsfa.12316
Abstract: BACKGROUND Official stable isotope databases, based on the analysis of (D/H)I ethanol , (D/H)II ethanol , δ13 Cethanol and δ18 Owater of wine, are today an indispensable tool for establishing the limits beyond which the… read more here.
Keywords: stable isotope; wine; isotope ratio; isotope ... See more keywords
Measurement of the 15N/14N ratio of phenylalanine in fermentation matrix by isotope ratio mass spectrometry
Sign Up to like & getrecommendations! Published in 2017 at "Biotechnology Letters"
DOI: 10.1007/s10529-017-2387-1
Abstract: AbstractObjectives To determine the origin of 15N-labeled phenylalanine in microbial metabolic flux analysis using 15N as a tracer, a method for measuring phenylalanine δ15N using HPLC coupled with elemental analysis-isotope ratio mass spectrometry (EA-IRMS) was… read more here.
Keywords: ratio mass; isotope ratio; ratio; phenylalanine ... See more keywords
Isotope Ratio Mass Spectrometry Coupled to Element Analyzer and Liquid Chromatography to Identify Commercial Honeys of Various Botanical Types
Sign Up to like & getrecommendations! Published in 2017 at "Food Analytical Methods"
DOI: 10.1007/s12161-017-0842-1
Abstract: The aim of the present work was to investigate whether honeys of various botanical characteristics could be discriminated and identified on the basis of the isotopic data. For this purpose, 45 commercial honey samples of… read more here.
Keywords: ratio mass; botanical types; isotope ratio; honey ... See more keywords
Development and validation of a multidimensional gas chromatography/combustion/isotope ratio mass spectrometry-based test method for analyzing urinary steroids in doping controls.
Sign Up to like & getrecommendations! Published in 2018 at "Analytica chimica acta"
DOI: 10.1016/j.aca.2018.05.016
Abstract: The misuse of the steroid hormone testosterone for performance enhancement has been frequently reported in the past, and its administration is prohibited in sports according to the regulations of the World Anti-Doping Agency (WADA). Testosterone… read more here.
Keywords: ratio mass; multidimensional gas; mass spectrometry; isotope ratio ... See more keywords
Combination of stable isotope ratio data and chromatographic impurity signatures as a comprehensive concept for the profiling of highly prevalent synthetic cannabinoids and their precursors.
Sign Up to like & getrecommendations! Published in 2020 at "Analytica chimica acta"
DOI: 10.1016/j.aca.2020.01.029
Abstract: In this study, we utilized elemental analyser (EA) and gas-chromatography (GC) isotope ratio mass spectrometry (IRMS) and ultra-high-performance liquid chromatography coupled to mass spectrometry (UHPLC-MS) in a comprehensive profiling approach assessing the chromatographic impurity signatures… read more here.
Keywords: synthetic cannabinoids; impurity signatures; isotope ratio; isotope ... See more keywords
Laboratory-based validation of a passive sampler for determination of the nitrogen stable isotope ratio of ammonia gas
Sign Up to like & getrecommendations! Published in 2021 at "Atmospheric Environment"
DOI: 10.1016/j.atmosenv.2020.118009
Abstract: Abstract Nitrogen stable isotope ratio (δ15N) analysis of ammonia gas (NH3) by using a passive sampler is expected to be useful for determining sources of NH3 and for examining environmental dynamics. However, the use of… read more here.
Keywords: passive sampler; isotope ratio; sampler; nitrogen stable ... See more keywords
Authenticity testing of environment-friendly Korean rice (Oryza sativa L.) using carbon and nitrogen stable isotope ratio analysis.
Sign Up to like & getrecommendations! Published in 2017 at "Food chemistry"
DOI: 10.1016/j.foodchem.2017.05.014
Abstract: The increasing demand for organic foods creates, in turn, a pressing need for the development of more accurate tools for the authentication of organic food in order to ensure both fair trade and food safety.… read more here.
Keywords: isotope ratio; ratio analysis; rice; environment friendly ... See more keywords
Stable isotope ratio analysis in determining the geographical traceability of Indian wheat
Sign Up to like & getrecommendations! Published in 2017 at "Food Control"
DOI: 10.1016/j.foodcont.2017.03.025
Abstract: Abstract Authentication of geographical origin of food has become indispensable because of the increased awareness of consumers and globalization of food market. A preliminary study was done to establish correlation between isotopic composition (δ13C, δ15N)… read more here.
Keywords: ratio analysis; isotope ratio; wheat; analysis determining ... See more keywords
Determination of the Isotopic Composition of Iridium Using Multicollector-ICPMS.
Sign Up to like & getrecommendations! Published in 2017 at "Analytical chemistry"
DOI: 10.1021/acs.analchem.7b02206
Abstract: Like many other elements, iridium is lacking a calibrated, SI traceable isotope ratio measurement. In this study, we have undertaken absolute isotope amount ratio measurements of iridium by multicollector inductively coupled plasma mass spectrometry (MC-ICPMS)… read more here.
Keywords: iridium; isotopic; multicollector; isotope ratio ... See more keywords
13C- and 15N-Isotope Analysis of Desphenylchloridazon by Liquid Chromatography-Isotope-Ratio Mass Spectrometry and Derivatization Gas Chromatography-Isotope-Ratio Mass Spectrometry.
Sign Up to like & getrecommendations! Published in 2019 at "Analytical chemistry"
DOI: 10.1021/acs.analchem.8b04906
Abstract: The widespread application of herbicides impacts surface water and groundwater. Metabolites (e.g., desphenylchloridazon from chloridazon) may be persistent and even more polar than the parent herbicide, which increases the risk of groundwater contamination. When parent… read more here.
Keywords: ratio mass; chromatography isotope; isotope ratio; isotope ... See more keywords