采用硝酸-过氧化氢消解体系,及高压密闭微波技术处理塑料包装材料,建立了电感耦合等离子体质谱法同时测定塑料包装材料中铅、镉、砷、铬、锑、汞、硒、钡、镍、锡、锶、铊多种有毒有害元素的方法。方法的检出限为0.02~0.20μg/L,相对标准偏差(RSD)小于10%,加标回收率为88.0%~117.0%。该方法简单、快速、灵敏、准确度好。
Plastic packaging materials were digested by mixed acids of nitric acid and hydrogen peroxide solution using high pressure and closed microwave digestion technology.A method for the determination of Pb,Cd,As,Cr,Sb,Hg,Se,Ba,Ni,Sn,Sr and Tl in packaging materials by ICP-MS was established.The detection limits are in the range of 0.02~0.20 μg/L;the relative standard deviations are less than 10%;the recoveries are in the range of 88.0%~117.0%.The results proved that this method is simple,accurate,and reliable.