气相色谱测定食品中酞酸酯类化合物的方法研究

目的]探讨食品中5种常见酞酸酯类环境污染物的气相色谱测定方法。方法]采用有机溶剂超声提取、中性氧化铝柱过柱净化和氮吹浓缩的前处理技术,用气相色谱-氢火焰离子化检测器（GC-FID）测定。结果]5种酞酸酯类化合物（PAEs）取得较好分离效果,标准曲线的相关系数均大于0.999,平均加标回收率为82.0%-101.0%,相对标准偏差（RSD）为2.8%-7.3%,方法最低检出限为2.0-8.6μg/kg。结论]该方法操作简便快捷、经济、灵敏度高,适用于一般实验室开展日常食品监测和检测。

Study on an Approach to Determining Phthalate Esters in Foods by Gas Chromatography ZHANG

Objective] To develop an approach to determining five common environment-polluted phthalate esters（PAEs） in foods by gas chromatography（GC）.Methods] After extracted from organic solvent by ultrasonic,cleaned by Alumina N column and concentrated by nitrogen,PAEs in the samples were determined by gas chromatography-flame ionization detector（GC-FID）.Results] Five PAEs were well-separated from each other.The study showed the correlation coefficients between them were all above 0.999;the average spike recovery rates and the relative standard deviations（RSDs）were in the range of 82.0% to 101.0% and 2.8% to 7.3% respectively;the limits of detection（LODs）were between 2.0 μg/kg and 8.6 μg/kg.Conclusion] The approach was found simple,convenient,economic,sensitive,and applicable to everyday monitoring and inspection of foods for laboratories.