气相色谱-质谱法测定肉及肉制品中的2,4-D-丁酯

建立肉及肉制品中2,4-D-丁酯的气相色谱-质谱联用仪检测方法。样品采用乙腈提取，弗罗里硅土柱固相萃取柱净化，外标法定量。结果表明：方法添加量为5～100μg/kg时，回收率均大于70%，相对标准偏差为1.0%～3.6%，线性相关系数为0.99996，方法的检出限为5μg/kg。本方法适用于肉及肉制品中2,4- D-丁酯的测定。

Determination of 2,4-D Butyl Ester in Meat and Meat Products by Gas Chromatography-Mass Spectrometry

A gas chromatography-mass spectrometry method was established to determine 2,4-D butyl ester in meat and meat products. Samples were extracted using acetonitrile and purified on florisil solid-phase extraction cartridge, quantified by external standard method. This reliable and stable method exhibited recovery rates of more than 70% at spike levels ranging from 5 to 100μg/kg, relative standard deviations of 1.0%－3.6%, a linear regression coefficient of 0.99996 and a detection limit of 5μg/kg.