微波消解-石墨炉原子吸收光谱法测定水基胶中的铅和砷

Determination of Lead and Arsenic in Water-based Adhesives by Microwave Digestion-Graphite Furnace Atomic Absorption Spectrometry

摘要: 建立了测定烟用水基胶中铅(Pb)和砷(As)的微波消解-石墨炉原子吸收光谱方法,并采用该方法测定了烟用水基胶中Pb和As的含量。结果表明:在优化条件下,Pb和As分别在0~50和0~20μg/L范围内,工作曲线的线性相关系数、方法的检出限、相对标准偏差及回收率依次分别为0.9992和0.9995,0.075和0.037 mg/kg,6.77%和9.86%,87.97%~92.35%和93.37%~108.92%,所测水基胶样品中Pb和As含量分别低于5 mg/kg和1 mg/kg。该方法适合于烟用水基胶中重金属Pb和As的定量分析。

Abstract: A method for analyzing lead (Pb) and arsenic (As) in water-based adhesives for cigarette was developed by microwave digestion-graphite furnace atomic absorption spectrometry. The results of tested samples showed that: under the optimized conditions, in the linear ranges of 0-50 μ g/L (Pb) and 0-20 μ g/L (As), the linear coefficients, limits of detection, relative standard deviations (RSDs), and recoveries were 0.9992 and 0.9995, 0.075 and 0.037 mg/kg, 6.77% and 9.86%, 87.97%-92.35% and 93.37%-108.92%, respectively. The contents of Pb and As were less than 5 and 1 mg/kg, respectively. The method was suitable for the quantitative analysis of lead and arsenic in water-based adhesives for cigarette.