A Research On Identification And Reasonable Match Of Edible Vegetable Oil

Objective:To analyse the fatty acid and volatile matter in vegetable oils by gas chromatography,then to search for a method to identify matching of mixed vegetable oil. According to thefatty acid ratio recommended by Nutrition Society, to decide the best ratio of variousvegetable oils in daily meals.Methods:To analyse the fatty acid of vegetable oils obtained from local market by GC. Variousvegetable oils were mixed per different ratio, then to utilize mathematic equations toexplain out the ratio in mixed oils by determining changes of fatty acid composition,meanwhile, to determine mark vclatile matter in oils by headspace gas chromatography,thus to search for a method to identify matching of mixed vegetable oil. According to thefatty acid analysis result, to set up mathematic model to decide the best ratio of edible oils.Results:1. The topic improved the government standard of fatty acid analysis by gaschromatography, the sample processing is convenient, and the abruption effect is better.2. Nine kinds of vegetable oils from different factory were determined, notrans-fatty acid was determined. The difference between the same kinds of vegetable oilswas little, can be the base data of fatty acids content.3. The method for matching identification is useful for the blend oils which everyvegetable oil content is non-infra 15%. The volatile matter analysis method by headspacegas chromatography can't obtain the expecting result, need to be improved.4. The best ratio of vegetable oils according to the mathematic model is soybean oil:rapeseed oil 7:3,soybean oil: peanut oil 1:1 or rapeseed oil: peanut oil: sunflower oil 3:1:6.Conclusions:When the ratio of component oils in mixed oils is non-infra 15%, its matching can be idéntified by fatty acid and mathematic analysis.