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

摘要: 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0.07 mol/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0.1~7.5 mg/L,相关系数大于0.9983,方法检出限为0.04~0.16 mg/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.

Abstract: 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 >0.9983. 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.