Determination of Preservatives in Infant Milk Powder and Children's Food by High Performance Liquid Chromatography
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.
high performance liquid chromatography methodadditivesinfant milk powderchildren food
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