摘 要：目的：建立气相色谱法测定食品中苯甲酸、山梨酸和脱氢乙酸含量的方法。方法：样品经酸化处理后，使用乙醚进行提取，气相色谱仪分离和定量分析。结果：苯甲酸、山梨酸和脱氢乙酸在各自线性范围内线性关系良好，精密度相对标准偏差在2.04%～4.23%，平均回收率在98.77%～100.14%，检出限分别为1.29 mg·kg-1、1.13 mg·kg-1和1.03 mg·kg-1，均符合相关要求。结论：本文建立的气相色谱法具有高精密度、高准确度和强选择性的特点，适用于酱油、果汁和腐乳等食品中苯甲酸、山梨酸和脱氢乙酸的测定。

    关键词：食品；苯甲酸；山梨酸；脱氢乙酸；气相色谱法

    Abstract： Objective： To establish a gas chromatography method for the determination of benzoic acid， sorbic acid， and dehydroacetic acid in food. Method： The samples were treated with acidification， extracted with ether， and then separated and quantitatively analyzed by gas chromatography. Result： Benzoic acid， sorbic acid and dehydroacetic acid had good linear relationships in their respective linear ranges. The relative standard deviation obtained from precision experiments was between 2.04% and 4.23% ......