固体食品中山梨酸、苯甲酸的液-液萃取及分离分析

目的:建立固体食品中山梨酸、苯甲酸的萃取及气相色谱分离分析的方法。方法:将固体食品制成稀浆状的水溶混合物,再以有机溶剂萃取,经色谱分离分析,并对色谱条件进行实验研究和优化。结果:同一样品测得值:山梨酸0.32 g/kg、苯甲酸0.29 g/kg,而直接取捣碎的固体样品进行萃取,其测得值为样品的检测限(山梨酸0.009 g/kg、苯甲酸0.010 g/kg)。结论:所建立的方法,对固体食品中山梨酸和苯甲酸萃取效果显著提高,组份分离彻底,重现性好,灵敏度高。

Liquid-liquid extraction and separates analysis of sorbic acid and benzoic acid in solid food

Objective:To establish a extraction and gas chromatography method for determination of sorbic acid and benzoic acid in solid food.Methods:Solid foods were made to the thin pulpous state the water-soluble mixture,and then organic solvent extraction,analysis by the chromatographic separation,and chromatographic conditions were experimentally studied and optimized.Results:Measure value with a sample: Sorbic acid 0.32 g/kg,benzoic acid 0.29 g/kg,but takes the stamp crushing the solid sample to carry on the extr...