GC-MS法检测塑料玩具中可迁移有机锡化合物

Determination of the Migration of Organotin Compounds in Plastic Toys by GC-MS

建立了气相色谱-质谱法（GC—MS）同时检测塑料玩具中可迁移有机锡化合物的方法．利用0．07mol／L盐酸溶液萃取塑料玩具中可迁移有机锡化合物，经四乙基硼酸钠衍生化，正己烷萃取后，采用GC-MS外标法进行定量检测．结果表明，方法的线性范围为0．1～7．5mg／L，相关系数大于0．9983，方法检出限为0．04～0．16mg／kg，平均回收率为89．3％～105．4％，相对标准偏差小于9．7％．方法简单、快速、准确，可用于塑料玩具中可迁移有机锡化合物的检测．

A procedure has been developed to determine the migration of organotin compounds in plastic toys by GC-MS method. The organotin compounds were extracted by an 0.07 mol/L hydrochloric acid solution, derivatied with NaBEt4, extracted by hexane, and the quantitative analysis of ethyl organotins was carried out by GC-MS, using an external standard method. The linear calibration curve was obtained in the range of 0.1 - 7.5 mg/L with a correlation coefficient of 〉 0. 998 3. The limits of quantification were 0.04 - 0. 16 mg/kg and the average recoveries were in the range of 89.3% - 105.4% for 10 organontins with the relative standard deviations 〈9.7%. The method is simple, rapid, accurate and can be applied to the determination of the migration of orgaontins in plastic toys.