采用电感耦合等离子体原子发射光谱法对铅锑合金中锑含量进行测定.样品经硝酸(1+1)溶液和200 g·L-1酒石酸溶液溶解,选择206.833 nm的谱线作为测定锑的分析线.锑的质量浓度在5.0~100.0 mg·L-1之间与其谱线强度呈线性关系.测定下限(10S/N)为0.179 mg·L-1.在优化的试验条件下,分析了两种铅锑合金样品,加标回收率分别为97.8%及98.6%,相对标准偏差(n=11)小于1.5%.

ICP-AES was applied to the determination of antimony in lead-antimony alloy.The sample was dissolved with HNO3(1+1) and 200 g·L-1 tartaric acid solution,and wavelength of 206.833 nm was selected as analytical spectal line for Sb.Linear relationship between values of spectral line intensity and mass concentration of Sb was kept in the range of 5.0-100.0 mg·L-1,with lower limit of determination (10S/N) of 0.179 mg·L-1.Under the optimum conditions,the proposed method was used in the analysis of two lead-antimony alloy samples,giving values of average recovery found by standard addition method of 97.8% and 98.6% for sample 1# and 2# respectively,with values of RSD′s (n=11) less than 1.5%.