Objective:To establish an analytical method for determining preservatives in infant milk powder and children's food using high-performance liquid chromatography.Method:The sample was extracted with water,precipitated with a protein agent,purified by n-hexane extraction,and quantitatively analyzed by high-performance liquid chromatography.Result:Dehydroacetic acid,benzoic acid,and sorbic acid showed a good linear relationship between 0.5 mg·L-1 to 100.0 mg·L-1,with a detection limit of 0.5 mg·kg-1 to 1.1 mg·kg-1 and a quantification limit of 0.9 mg·kg-1 to 2.2 mg·kg-1;the average recovery rate of spiked samples ranged from 90.1% to 109.2%,with a relative standard deviation of 1.2% to 4.2% (n=6).Conclusion:This method is easy to operate,highly accurate,and suitable for the detection of dehydroacetic acid,benzoic acid,and sorbic acid in infant milk powder and children's food.
关键词
高效液相色谱法/防腐剂/婴幼儿乳粉/儿童食品
Key words
high performance liquid chromatography method/additives/infant milk powder/children food
维普
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