常压火焰离子化质谱技术对食用植物油快速分析的初探

Preliminary Study on Fast Analysis of Edible Vegetable Oils by Ambient Flame Ionization-Mass Spectrometry

建立了常压火焰离子化质谱(Ambient flame ionization mass spectrometry,AFI-MS)快速分析食用植物油(橄榄油、芝麻油、花生油和葵花籽油)的方法。AFI-MS检出食用植物油(橄榄油、芝麻油、花生油和葵花籽油)中的26种甘油三酯和11种甘油二脂。AFI-MS分析显示,不同的食用植物油(橄榄油、芝麻油、花生油和葵花籽油)得到的质谱图轮廓信息不同。通过对不同食用植物油的甘油三酯相对峰强度进行分析,可初步归纳出食用植物油的类型。AFI-MS分析食用植物油的操作简单,普通的打火机就可以作为离子源用于食用植物油的分析。这种便捷的离子化技术可以用于食用植物油的快速分析。

An analytical method for the rapid analysis of edible vegetable oils was developed by ambi- ent flame ionization mass spectrometry（ AFI - MS）. The AFI - MS was used to analyze four edible vegetable oils, including olive oil, sesame oil, peanut oil and sunflower oil. 26 kinds of triglycer- ides and l 1 kinds of dialyeerides in olive oil, peanut oil, sunflower oil, sesame oil were detected by the AFI - MS. In view of the differences of MS profiles of edible vegetable oils （ olive oil, sesame oil, peanut oil and sunflower oil）, the relative abundances of triglycerides in edible vegetable oils were obtained. The differences of relative abundances were capable of preliminary identification of four ed- ible vegetable oils. The experimental results demonstrated the feasibility and convenience for fast analysis of edible vegetable oils by the AFI - MS. The results showed that the simple and convenient AFI - method is potential for fast analysis of edible vegetable oils.