化学
化学计量学
可追溯性
同位素比值质谱法
稳定同位素比值
氮同位素
质谱法
同位素
核(代数)
碳同位素
全麦
分析化学(期刊)
食品科学
氮气
环境化学
统计
色谱法
数学
物理
总有机碳
组合数学
有机化学
量子力学
作者
Syed Abdul Wadood,Bin Guo,Yimin Wei
摘要
Abstract 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.
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