Chemical Isotope Labeling Liquid Chromatograph-Mass Spectrometer: A Powerful Tool for Analyzing Non-Volatile Organic Acids in Baijiu
文献类型： 外文期刊
作者： Zhao, Chi 1 ; Mao, Zhenyu 2 ; Penttinen, Petri 4 ; Zhang, Fengju 1 ; Dong, Ling 1 ; Song, Chuan 2 ; Xiong, Yanfei 2 ; Zhang, Xiaoping 4 ; Fu, Xin 2 ; Zhang, Suyi 2 ; Li, Zhihua 1 ;
作者机构： 1.Sichuan Acad Agr Sci, Inst Agroprod Proc Sci & Technol, Chengdu 610066, Peoples R China
2.Luzhou Laojiao Co Ltd, Luzhou 646000, Peoples R China
3.Natl Engn Res Ctr Solid State Brewing, Luzhou 646000, Peoples R China
4.Sichuan Agr Univ, Coll Resources, 211 Huimin Rd, Chengdu 611130, Sichuan, Peoples R China
5.Univ Helsinki, Fac Agr & Forestry, Viikinkaari 1, Helsinki 00014, Finland
关键词： CIL-HRMS; metabolomics; NVOAs; different-flavored baijiu; biomarkers
期刊名称：FOODS （ 影响因子：5.1； 五年影响因子：5.6 ）
ISSN：
年卷期： 2025 年 14 卷 6 期
页码：
收录情况： SCI
摘要： Non-volatile organic acids (NVOAs) are essential to the flavor profile of Baijiu. However, the low levels and diversity of NVOAs in Baijiu make their isolation, annotation, and quantification challenging. In this study, a well-established pipeline combining chemical derivatization, isotope labeling, and high-resolution mass spectrometry with a three-tier annotation process was used to quantify NVOAs in three typical flavor types of Baijiu with high coverage and confidence. The results revealed the annotation of 56, 145, and 1277 NVOAs in Baijiu at tier 1, tier 2, and tier 3 levels, respectively. Among them, a total of 166 high-confidence NVOAs were first reported in Baijiu. Furthermore, multivariate statistical analyses indicated that abundant NVOAs could potentially be used as biomarkers to distinguish between different flavor types of Baijiu. This study provides a powerful tool for the qualification and quantification of NVOAs in Baijiu. The results will greatly expand the understanding of NVOAs in Baijiu.
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