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| 基于植物油中脂肪酸烷基酯含量变化鉴别废弃油脂 |
| Identification of waste oil based on change of fatty acid alkyl esterscontent in edible vegetable oil |
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| DOI：10.12166/j.zgyz.1003-7969/2020.01.010 |
| 中文关键词: 植物油 脂肪酸烷基酯 废弃油脂 鉴别 |
| 英文关键词:vegetable oil fatty acid alkyl ester waste oil identification |
| 基金项目:湖北省食品药品监督管理局2018—2019年度科研项目（201802009） |
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| 中文摘要: |
| 采用固相萃取柱净化，气相色谱-质谱联用法测定了6种植物油中脂肪酸烷基酯（包括脂肪酸甲酯和脂肪酸乙酯）的含量，并研究其在植物油煎炸、废弃及废弃油脂精炼等环节中的变化。结果发现, 6种植物油中脂肪酸烷基酯的含量均低于30 mg/kg，而植物油在废弃过程中可能会形成大量脂肪酸乙酯，生成量与油脂是否烹饪及废弃物中乙醇含量有关。脂肪酸烷基酯在脱色工艺中不能被去除，但在脱臭中可被去除。因此，可以通过测定植物油中脂肪酸烷基酯含量发现废弃油脂，为废弃油脂的鉴别工作提供新的思路。 |
| 英文摘要: |
| The content of fatty acid alkyl esters (including fatty acid methyl esters and fatty acid ethyl esters) in six kinds of vegetable oils was analyzed by gas chromatography-mass spectrometry using solid phase extraction column purification. The change of their content in the process of frying, discarding and waste oil refining were studied. It was found that the contents of fatty acid alkyl esters in six kinds of vegetable oils were below 30 mg/kg, and vegetable oils might produce large amounts of fatty acid ethyl esters in discarding. The amount of fatty acid ethyl esters produced depended on whether the oil was cooked or not and content of ethanol in the waste. Fatty acid alkyl esters could not be removed in bleaching process, but could be removed in deodorization. So waste oils could be identified by determining the content of fatty acid alkyl esters in vegetable oils, which provided a new idea for the identification of waste oil. |
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