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Geographical traceability of wheat and its products using multielement light stable isotopes coupled with chemometrics
Author(s) -
Wadood Syed Abdul,
Boli Guo,
Yimin Wei
Publication year - 2019
Publication title -
journal of mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 1076-5174
DOI - 10.1002/jms.4312
Subject(s) - chemistry , chemometrics , traceability , isotope ratio mass spectrometry , stable isotope ratio , isotopes of nitrogen , mass spectrometry , isotope , kernel (algebra) , isotopes of carbon , whole wheat , analytical chemistry (journal) , food science , nitrogen , environmental chemistry , statistics , chromatography , mathematics , organic chemistry , quantum mechanics , total organic carbon , combinatorics , physics
The present study was aimed to investigate the variation of stable isotopic ratios of carbon, nitrogen, hydrogen, and oxygen in wheat kernel along with different processed fractions from three geographical origins across 5 years using isotope ratio mass spectrometry (IRMS). Multiway ANOVA revealed significant differences among region, harvest year, processing, and their interactions for all isotopes. The region contributed the major variability in the δ 13 C ‰, δ 2 H ‰, δ 15 N ‰, and δ 18 O‰ values of wheat. Variation of δ 13 C ‰, δ 15 N ‰, and δ 18 O ‰ between wheat whole kernel and its products (break, reduction, noodles, and cooked noodles) were ˂0.7‰, and no significant difference was observed, suggesting the reliability of these isotope fingerprints in geographical traceability of wheat‐processed fractions and foods. A significant influence of wheat processing was observed for δ 2 H values. By applying linear discriminant analysis (LDA) to the whole dataset, the generated model correctly classified over 91% of the samples according to the geographical origin. The application of these parameters will assist in the development of an analytical control procedure that can be utilized to control the mislabeling regarding geographical origin of wheat kernel and its products.