Identification of volatile sulfur-containing compounds and the precursor of dimethyl sulfide in cold-pressed rapeseed oil by GC-SCD and UPLC-MS/MS

文献类型： 外文期刊

第一作者： Yu, Pei

作者： Yu, Pei;Yang, Yini;Jia, Xiao;Zheng, Chang;Zhou, Qi;Huang, Fenghong;Yu, Pei;Yang, Yini;Jia, Xiao;Zheng, Chang;Zhou, Qi;Huang, Fenghong;Sun, Jinyuan

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关键词： Cold-pressed rapeseed oil; Volatile sulfur-containing compounds; Sulfur chemiluminescence detection; Dimethyl sulfide; S-methylmethionine; Ultra-performance liquid chromatography  tandem mass-spectrometry

期刊名称：FOOD CHEMISTRY （ 影响因子：9.231； 五年影响因子：8.795 ）

ISSN： 0308-8146

年卷期： 2022 年 367 卷

页码：

收录情况： SCI

摘要： Volatile sulfur-containing compounds (VSCs) provide an important contribution to foods due to their special odors. In this study, VSCs in 21 cold-pressed rapeseed oils (CROs) from 9 regions in China were extracted and separated by headspace solid-phase microextraction combined with gas chromatography coupled with sulfur chemiluminescence detection. 19 VSCs were identified by authentic standards, and the total concentration of VSCs in all CROs ranged from 49.0 to 18129 mu g/kg. Dimethyl sulfide (DMS), with its high odor activity value (7-14574), was the most significant aroma contributor to the CROs. Furthermore, S-methylmethionine (SMM) in rapeseed was first affirmed by ultra-performance liquid chromatography-tandem mass spectrometry and isotope quantitation. The positive correlation coefficient between DMS and SMM was 0.793 (p < 0.05), which confirmed SMM as a crucial precursor of DMS in CROs. This study provided a theoretical basis for selecting rapeseed materials by the distribution of essential VSCs and the source of DMS.

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