【摘要】 采用液液萃取的前处理方式,以气相色谱-质谱联用仪(gas chromatography-mass spectrometry,GC-MS)检测水产品中氟乐灵的残留量。水产品经过匀质,丙酮提取,正己烷进行液液分配,弗罗里硅土柱净化后,用气相色谱-质谱联用仪进行测定和确认,外标法定量。该方法在5～100μg/L质量浓度范围内,相关系数R2为0.99996,具有良好的线性关系,检测限均为1.0μg/kg。分别在鳗鱼、梭子蟹、黄花鱼、印度虾和蛤蜊5种水产品中添加1～4μg/L氟乐灵,回收率在82.0%～93.6%之间。该方法操作简单、灵敏度高,可以满足水产品中氟乐灵的定性定量检测要求。更多还原

【Abstract】 A gas chromatography-mass spectrometry(GC-MS) method is presented for determining trifluralin residues in aquatic products in this paper.In the method,extraction with acetone,partition with n-hexane and cleanup on a Florisil solid-phase extraction column were used for sample preparation,and quantification was performed by the external standard method.Trifluralin concentration exhibited a good linearity over the range of 5-100μg/L,with a correlation coefficient of 0.99996.The detection limit of this method was 1.0μg/kg for trifluralin.The recovery rates of trifluralin in eel,corvine,India shrimp,clams and swimming crab across the spike levels of 1.0,2.0μg/kg and 4.0μg/kg were 82.0%-93.6%.This simple and sensitive method can be applied for the determination of trifluralin residues in aquatic products.更多还原