提出了火焰原子吸收光谱法测定仿真饰品中的铅、镉和钡的含量。详细叙述了不同材料饰品的前处理方法。在优化的仪器工作条件下,铅、镉和钡的质量浓度分别在0.1~5.0,0.05~1.0,1.0~20 mg·L-1范围内与吸光度呈线性关系,方法的检出限(3s)依次为0.05,0.006,0.1 mg·L-1。方法用于测定样品中铅、镉和钡的含量,加标回收率在88.0%~104%之间,测定值的相对标准偏差(n=7)均不大于4%。

The contents of Pb, Cd and Ba in imitation decorations were determined by FAAS. The pretreatment methods of different kinds of samples were described in detail. Under the optimized conditions, linear relationships between values of absorbance and mass concentration of the 3 elements were kept in ranges of 0.1-5.0 mg·L-1 (for Pb), 0.05-1.0 mg·L-1 (for Cd) and 1.0-20 mg·L-1 (for Ba), with detection limits (3s) of 0.05, 0.006, 0.1 mg·L-1 respectively. The proposed method was applied to the determination of the 3 elements in imitation decorations, giving values of recovery obtained by standard addition method in the range of 88.0%-104% with RSD′s (n=7) less than or equal to 4%.