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建立了一种同时测定接装纸中砷、钼、镉、铊和铅5种元素的电感耦合等离子体质谱分析方法,实验采用微波消解前处理样品,HNO3-H2O2-HF混合体系作消解剂。方法的加标回收率94.79%~114.6%,检出限0.002~0.18μg/L,相对标准偏差1.1%~4.4%(n=5),线性相关系数0.9996~1.000。用所建立的方法测定了17个牌号接装纸中砷、钼、镉、铊和铅的含量,结果发现:砷、钼、镉、铊和铅在接装纸中的含量较低,其平均值均低于1.0μg/g,接装纸中钼和铊两种元素的变异较大,镉的变异最小,其变异系数分别为98.5%、151.1%,53.0%。
An ICP-MS method for simultaneous determination of 5 elements of arsenic, molybdenum, cadmium, thallium and lead in tipping paper was established. The sample was pre-treated with microwave digestion and the HNO3-H2O2-HF mixture was used as a digestion reagent. The recoveries were 94.79% ~ 114.6%. The detection limits were 0.002 ~ 0.18μg / L with relative standard deviations of 1.1% -4.4% (n = 5). The linear correlation coefficients were 0.9996-1.000. The contents of arsenic, molybdenum, cadmium, thallium and lead in 17 grades of tipping paper were measured by the established method. The results showed that the content of arsenic, molybdenum, cadmium, thallium and lead in the tipping paper was lower, and the average The values of both were lower than 1.0μg / g. There were large variations of molybdenum and thallium in the paper. The variation coefficient of cadmium was 98.5%, 151.1% and 53.0% respectively.