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
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
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
New Concepts for the Determination of Oxidation Efficiencies in Liquid Chromatography-Isotope Ratio Mass Spectrometry.
Sign Up to like & getrecommendations! Published in 2019 at "Analytical chemistry"
DOI: 10.1021/acs.analchem.8b05315
Abstract: In liquid chromatography coupled to isotope ratio mass spectrometry (LC-IRMS), analytes are separated on an LC system and consecutively oxidized to CO2, which is required for the determination of compound-specific carbon isotope ratios. Oxidation is… read more here.
Keywords: ratio mass; oxidation; oxidation efficiencies; isotope ratio ... See more keywords