| 杨 扬,殷 乐,尹芳华，等.几种食用油的核磁共振光谱特征与地沟油的快速检测[J].中国油脂,2015,40(7):.[YANG Yang,YIN Yue,YIN Fanghua,etc.NMR spectra characteristics of several kinds of edible oils and quick discerning of swill-cooked dirty oil[J].China Oils and Fats,2015,40(7):.] |
| 几种食用油的核磁共振光谱特征与地沟油的快速检测 |
| NMR spectra characteristics of several kinds of edible oils and quick discerning of swill-cooked dirty oil |
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| DOI： |
| 中文关键词: 食用油 地沟油 核磁共振氢谱 核磁共振碳谱 分析鉴定 |
| 英文关键词:edible oil swill-cooked dirty oil 1H NMR 13C NMR discriminant analysis |
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| 中文摘要: |
| 检测了大豆油、菜籽油、芥花油、芝麻油、橄榄油、花生油、玉米油、葵花籽油、猪油、鱼油及地沟油的1 H NMR、13 C NMR光谱(核磁共振氢谱、碳谱)。结果发现：植物油与猪油和鱼油有明显的区别；地沟油由于其产生、酸败和处理过程中有部分甘油酯的分子发生变化，所以在氢谱图的δ6.70~5.50、δ5.10和δ3.73等处有明显的杂峰；地沟油、猪油和鱼油在氢谱图的δ1.26处的峰比δ1.30处明显强很多；地沟油碳谱图在δ178.33、δ173.87、δ86.60、δ68.39和δ65.06处有明显的小峰存在，它们可以作为判断地沟油特征峰的依据。与其他分析方法相比，该方法具有操作简单、不需要预处理和快速等优点。 |
| 英文摘要: |
| The 1H NMR and 13C NMR spectra of soybean oil, rapeseed oil, mustard oil，sesame oil, olive oil, peanut oil, corn oil, sunflower seed oil, lard, fish oil and swill-cooked dirty oil were detected. The results showed that vegetable oils had obvious differences with lard and fish oil; in the 1H NMR spectra of swill-cooked dirty oil, there were distinctive extra peaks in the ranges of δ 6.70-5.50, δ5.10 and δ3.73,probably because the molecular structure of part triglycerides had been changed during the production, rancidity and treatment of swill-cooked dirty oil. The δ 1.26 peak in ′H NMR spectra of swill-cooked dirty oil, lard and fish oil was much higher than δ 1.30 peak. In the 13C NMR spectra of swill-cooked dirty oil, there were distinctive extra small peaks in δ 178.33, δ173.87, δ86.60, δ 68.39 and δ 65.06. These characteristic peaks could be used as proofs for the discerning of swill-cooked dirty oil. This method was simple and quick without the need for the pretreatment of samples compared with other methods. |
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