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气相色谱法测定水产品中三氯杀螨醇残留量

Keywords: 水产品,三氯杀螨醇,测定方法

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Abstract:

为拓展食品中农药残留监控范围,本文建立了水产品中三氯杀螨醇的气相色谱测定方法。试验基质为鳗鲡、罗非鱼、对虾、玻纹巴菲蛤,取其可食用组织的均匀试样1g,用正己烷超声萃取,用浓硫酸和弗罗里硅土净化,二氯甲烷/正己烷混合液淋洗层析柱。洗脱液收集和旋转蒸发浓缩后,用气相色谱法测定其中的三氯杀螨醇,外标法定量。测定仪器为HP6890N型气相色谱仪,配HP7683B型自动进样器、HP-5型毛细管气相色谱柱(30m×0.32mm×0.25μm)和63Ni微电子捕获检测器。三氯杀螨醇浓度线性范围是0.0025~0.4μg·mL-1(r=0.9998,P10。本方法试样用量少,前处理简便,可操作性强,适合测定水产品可食部分的三氯杀螨醇残留量。

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