数字农科院2.0

A simple and accurate method for lamb traceability based on gas chromatography-ion mobility spectrometry

文献类型： 外文期刊

作者： Mengjie Qie;Jing Liu;Xiaoting Yang;Shilin Zhao;Yumeng Hu;Yan Zhao

作者机构：

关键词： GC-IMS;Incubation temperature;Lamb;Meat;Metabolic pathways;Traceability

期刊名称： Food Chemistry

ISSN： 0308-8146

年卷期： 2025 年 497 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： For economic gain, lower-grade mutton is sometimes mislabeled and sold as premium lamb. To ensure authenticity, this study employed gas chromatography–ion mobility spectrometry (GC-IMS) combined with chemometrics to trace lamb samples from four regions. While incubation at 60 °C released more volatile organic compounds (VOCs) than at 40 °C (185 vs. 81), the heat-induced compounds masked origin-specific signatures, establishing 40 °C as the optimal temperature for reliable traceability. An OPLS-DA model identified 15 key VOCs with a variable influence on projection (VIP) >1, such as pentanal (D), acetoin (D), and hexanal. Integrated metabolomics revealed that lamb VOCs are co-regulated by branched-chain amino acid (BCAA) degradation, lipid oxidation, and energy metabolism, with BCAA degradation particularly prominent in samples from Ningxia, Gansu, and New Zealand, serving as a key discriminant. Linear discriminant analysis (LDA) achieved 100 % initial classification and 97.4 % cross-validation accuracy, demonstrating a robust method for lamb origin traceability.

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