金属饰品样品用硝酸(20+80)溶液浸泡过夜,采用电感耦合等离子体原子发射光谱法测定金属饰品中铅、镉、铬、汞、锑、砷、硒、钡和镍的溶出量。选择波长为216.9,228.8,267.7,194.2,206.8,189.0,196.0,455.4,216.6 nm的9条谱线依次作为测定铅、镉、铬、汞、锑、砷、硒、钡和镍的分析线。铅、镉、铬、锑、砷、硒、钡和镍的质量浓度与其发射强度在10.0 mg·L-1以内、汞在2.0 mg·L-1以内呈线性关系,检出限(3s)在0.002~0.05 mg·L-1之间。方法用于金属饰品的分析,回收率在95.4%~103.0%之间,测定值的相对标准偏差(n=11)在0.68%~2.0%之间。

Sample of metal decoration was immersed in HNO3-H2O (20+80) solution for 24 h, and the contents of Pb, Cd, Cr, Hg, Sb, As, Se, Ba and Ni in sample solution were determined by ICP-AES. Wavelengths of 216.9, 228.8, 267.7, 194.2, 206.8, 189.0, 196.0, 455.4 and 216.6 nm were selected as analytical lines for the determination of the 9 elements respectively. Linear relationships between values of emission intensity of Cd, Cr, Se, Ba and Ni were found in the ranges within 10.0 mg·L-1, and within 2.0 mg·L-1 for Hg. Values of detection limit (3s) of the method found were in the range of 0.002-0.05 mg·L-1. The proposed method was used in the analysis of metal decorations, giving values of recovery and RSD′s (n=11) in the ranges of 95.4%-103.0% and 0.68%-2.0% respectively.