ICP-MS法测定铝塑复合食品包装中的9种重金属

Determination of 9 Heavy Metals in Aluminum-Plastic Composite Packaging by ICP-MS

采用电感耦合等离子体质谱法同时测定铝塑复合食品包装容器中的9种重金属（铅、镍、镉、铬、铜、砷、锰、锌、钛）。该方法的检出限为0.01～1.62μg/kg,定量限为0.03～5.35μg/kg,线性良好,相关系数均不小于0.99;在3个水平（20、50、100μg/kg）进行添加实验,加标回收率在82.6%～119.3%之间,相对标准偏差在0.1%～12.3%之间。该方法快速、简便,具有较好的准确度和精密度,适合于铝塑复合食品包装中的重金属检测。

A method for the determination of nine heavy metals including lead, nickel, cadmium, chromium, copper, arsenic, manganese, zinc, and titanium in aluminum-plastic composite packaging by inductively coupled plasma mass spectrometry（ICP-MS） has been developed. The limits of detection（LODs） were between 0.01 and 1.62 μg/kg and the limits of quantitation（LOQs） were between 0.03 and 5.35 μg/kg. Good linearity with correlation coefficients ≥ 0.99 was obtained. The recoveries ranged from 82.6% to 119.3% with relative standard deviations（RSDs） of 0.1%–12.3% at three spiked concentration levels（20, 50, and 100 μg/kg）. The method is rapid, simple, and has good accuracy and precision. It is suitable for the determination of heavy metals in aluminum-plastic composite packaging.