4.7 Article

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

期刊

FOOD CHEMISTRY
卷 367, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.130741

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

资金

  1. National Natural Science Foundation of China [31871838, 31501528]
  2. Key research projects of Hubei Province [2020BBA045]
  3. Agricultural Science and Technology Innovation Project of Chinese Academy of Agricultural Sciences [CAAS-ASTIP-2016-OCRI]
  4. Open Project Program of Beijing Key Laboratory of Flavor Chemistry [SPFW2021YB05]
  5. China Agriculture Research System of MOF
  6. China Agriculture Research System of MARA

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This study analyzed volatile sulfur-containing compounds (VSCs) in 21 cold-pressed rapeseed oils from different regions in China, finding that dimethyl sulfide (DMS) was the most significant aroma contributor. It confirmed S-methylmethionine (SMM) as a crucial precursor of DMS through analysis.
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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