| 周易枚.不同等级菜籽油中挥发性气味物质检测的 顶空固相微萃取条件优化及鉴定[J].中国油脂,2021,46(11):40~43.[ZHOU Yimei.Optimization of headspace solid phase microextraction and identification of volatile odor substances in different grades of rapeseed oils[J].China Oils and Fats,2021,46(11):40~43.] |
| 不同等级菜籽油中挥发性气味物质检测的 顶空固相微萃取条件优化及鉴定 |
| Optimization of headspace solid phase microextraction and identification of volatile odor substances in different grades of rapeseed oils |
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| DOI： |
| 中文关键词: 菜籽油 挥发性气味物质 固相微萃取 |
| 英文关键词:rapeseed oil volatile odor substance solid phase microextraction |
| 基金项目:南通市市级社会民生科技项目（MS12021027）；南通市市级科技计划（JCZ18030） |
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| 中文摘要: |
| 采用顶空固相微萃取-气相色谱质谱法测定不同等级菜籽油中的挥发性气味物质。以总峰面积和出峰数量为指标，采用单因素实验对顶空固相微萃取条件(萃取头、萃取温度、吸附时间、解吸时间）进行优化，并在最优条件下对一级、三级、四级菜籽油的挥发性气味物质进行鉴定。结果表明：检测菜籽油中挥发性气味物质的最优顶空固相微萃取条件为采用50/30 μm CAR/DVB/PDMS萃取头、萃取温度75 ℃、吸附时间30 min、解吸时间2 min，在此条件下经过GC-MS检测出的菜籽油挥发性气味物质成分最多，总峰面积最大。在最优萃取条件下测得一级、三级、四级菜籽油中挥发性气味物质分别有11、17、25种，其中一级菜籽油的主要挥发性气味物质为醛类，占57.94%；三级、四级菜籽油的主要挥发性气味物质为硫甙降解产物和杂环类物质，分别占37.33%、50.52%和17.50%、25.90%。 |
| 英文摘要: |
| Headspace solid phase microextraction-gas chromatography-mass spectrometry was used to determine the volatile odor substances in different grades of rapeseed oils. The headspace solid phase microextraction conditions (extraction head, extraction temperature, adsorption time, and desorption time)were optimized by single factor experiment using total peak area and number of peaks as indicators. Under the optimal conditions, the volatile odor substances in the first, third and fourth grade rapeseed oils were identified.The results showed that the optimal headspace solid phase microextraction conditions were obtained as follows: with 50/30 μm CAR/DVB/PDMS as extraction head, adsorption time 30 min, extraction temperature 75 ℃, and desorption time 2 min. Under the optimal extraction conditions, the most volatile odor substances of rapeseed oil were detected by GC-MS with the largest total peak area, and 11,17 and 25 volatile flavor components were measured in the first, third and fourth grade rapeseed oils, respectively. The main volatile odor substances of the first grade rapeseed oil were aldehydes, accounting for 5794%; the main volatile odor substances of the third and fourth grade rapeseed oils were thioside degradation products and heterocyclic substances, accounting for 37.33%, 50.52% and 17.50%, 25.90%,respectively. |
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