Calibration and data processing in gas chromatography combustion isotope ratio mass spectrometry
Deutscher übersetzter Titel: | Kalibrierung und Datenverarbeitung bei der Gaschromatographie-Combustion-Isotopenverhältnis-Massenspektrometrie |
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Autor: | Zhang, Ying; Tobias, Herbert J.; Sacks, Gavin L.; Brenna, J. Thomas |
Erschienen in: | Drug testing and analysis |
Veröffentlicht: | 4 (2012), 12 (Stable isotope ratio analysis in sports anti-doping), S. 912-922, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 1942-7603, 1942-7611 |
DOI: | 10.1002/dta.394 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201301000591 |
Quelle: | BISp |
Abstract
Compound-specific isotope analysis (CSIA) by gas chromatography combustion isotope ratio mass spectrometry (GCC-IRMS) is a powerful technique for the sourcing of substances, such as determination of the geographic or chemical origin of drugs and food adulteration, and it is especially invaluable as a confirmatory tool for detection of the use of synthetic steroids in competitive sport. We review here principles and practices for data processing and calibration of GCC-IRMS data with consideration to anti-doping analyses, with a focus on carbon isotopic analysis (13 C/12 C). After a brief review of peak definition, the isotopologue signal reduction methods of summation, curve-fitting, and linear regression are described and reviewed. Principles for isotopic calibration are considered in the context of the Δ13C = δ13CM – δ13CE difference measurements required for establishing adverse analytical findings for metabolites (M) relative to endogenous (E) reference compounds. Considerations for the anti-doping analyst are reviewed. Verf.-Referat