【摘要】 通过对液态、固液混合态食品前处理方法的改进,用气相色谱法快速测定山梨酸、苯甲酸的含量。样品酸化后用乙醚提取,直接取上清液进样分析,使用美国安捷伦公司6890型气相色谱仪,氢火焰离子化检测器(FID)和DB-FFAP123-3233色谱柱(30m×320μm)1h内可测得两种防腐剂的平均回收率为99.82%(n=6),平均相对标准偏差为1.265%,检测限为1mg/kg。更多还原

【Abstract】 To determine sorbic acid and benzoic acid quickly in liquid and solid-liquid mixed foods by gas chromatography with an improved pretreatment: use diethyl ether to extract the samples after they were acidated and then analyze the liquid at the upper part directly. GC conditions: Agilent 6890 gas chromatograph; ditector: flame ionization ditector; chromatographic column: DB-FFAP123-3233(30m×320μm×0.5μm). Results:The two antiseptics were determined within one hour, with the average recovery ratio of 99.82%(n=6), average RSD of 1.265% and detection limit of 1 mg/kg.更多还原