Stable Carbon Isotope Ratios (δ13C Values []) of Individual Sterols in the Oils of C3, C4, and CAM Plants.
J Agric Food Chem
; 72(14): 8247-8256, 2024 Apr 10.
Article
em En
| MEDLINE
| ID: mdl-38551065
ABSTRACT
The compound-specific determination of δ13C values [] by gas chromatography interfaced with isotope ratio mass spectrometry (GC-IRMS) is a powerful analytical method to indicate minute but relevant variations in the 13C/12C ratio of sample compounds. In this study, the δ13C values [] of individual sterols were measured in eleven different oils of C3, C4, and CAM plants (n = 33) by GC-IRMS. For this purpose, a suitable acetylation method was developed for sterols. Nine of the eleven phytosterols identified by GC with mass spectrometry (GC/MS) could be measured by GC-IRMS. The δ13C values [] of individual sterols and squalene of C3 plant oils were between 3 and >16 more negative (lighter in carbon) than in C4 and CAM oils. We also showed that the blending of C4 oils into C3 oils (exemplarily conducted with one olive and one corn oil) would be precisely determined by means of the δ13C value [] of ß-sitosterol.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Fitosteróis
/
Carbono
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Alemanha