| Online-Ressource |
Verfasst von: | Greule, Markus [VerfasserIn]  |
| Le, Phuong Mai [VerfasserIn]  |
| Meija, Juris [VerfasserIn]  |
| Mester, Zoltán [VerfasserIn]  |
| Keppler, Frank [VerfasserIn]  |
Titel: | Comparison of carbon isotope ratio measurement of the vanillin methoxy group by gc-irms and 13c-qnmr |
Verf.angabe: | Markus Greule, Phuong Mai Le, Juris Meija, Zoltán Mester, and Frank Keppler |
Jahr: | 2024 |
Umfang: | 6 S. |
Illustrationen: | Illustrationen, Diagramme |
Fussnoten: | Im Titel ist 13 hochgestellt ; Published online 28 November 2023, published in issue 3 January 2024 ; Gesehen am 14.03.2024 |
Titel Quelle: | Enthalten in: American Society for Mass SpectrometryJournal of the American Society for Mass Spectrometry |
Ort Quelle: | Washington, DC : ACS Publications, 1990 |
Jahr Quelle: | 2024 |
Band/Heft Quelle: | 35(2024), 3, Seite 100-105 |
ISSN Quelle: | 1879-1123 |
Abstract: | Site-specific carbon isotope ratio measurements by quantitative 13C NMR (13C-qNMR), Orbitrap-MS, and GC-IRMS offer a new dimension to conventional bulk carbon isotope ratio measurements used in food provenance, forensics, and a number of other applications. While the site-specific measurements of carbon isotope ratios in vanillin by 13C-qNMR or Orbitrap-MS are powerful new tools in food analysis, there are a limited number of studies regarding the validity of these measurement results. Here we present carbon site-specific measurements of vanillin by GC-IRMS and 13C-qNMR for methoxy carbon. Carbon isotope delta (δ13C) values obtained by these different measurement approaches demonstrate remarkable agreement; in five vanillin samples whose bulk δ13C values ranged from −31‰ to −26‰, their δ13C values of the methoxy carbon ranged from −62.4‰ to −30.6‰, yet the difference between the results of the two analytical approaches was within ±0.6‰. While the GC-IRMS approach afforded up to 9-fold lower uncertainties and required 100-fold less sample compared to the 13C-qNMR, the 13C-qNMR is able to assign δ13C values to all carbon atoms in the molecule, not just the cleavable methoxy group. |
DOI: | doi:10.1021/jasms.3c00327 |
URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext: https://doi.org/10.1021/jasms.3c00327 |
| DOI: https://doi.org/10.1021/jasms.3c00327 |
Datenträger: | Online-Ressource |
Sprache: | eng |
K10plus-PPN: | 1883470242 |
Verknüpfungen: | → Zeitschrift |
Comparison of carbon isotope ratio measurement of the vanillin methoxy group by gc-irms and 13c-qnmr / Greule, Markus [VerfasserIn]; 2024 (Online-Ressource)