ICP-AES法同时测定银合金中的锡铜镧

Simultaneous Determination of Sn, Cu and La in Ag Alloys by ICP-AES

用ＩＣＰ－ＡＥＳ法同时测定合金组分Ｓｎ、Ｃｕ和Ｌａ，盐酸沉淀Ａｇ，银基体不干扰测定，标准溶液中不须加入银与合金试样匹配。合成样实验回收率９５％～１０５％；相对标准偏差Ｓｎ、Ｃｕ＜０．５％、Ｌａ＜１％，测定范围以基体含量浓度２ｍｇ／ｍｌ计，Ｓｎ１１％～４５％、Ｃｕ７％～３０％、Ｌａ０．０５％～０．１５％。

Simultaneous determination was done by ICP-AES. The interference of the matrix was eliminated after hydrochloric acid precipitated silver ions. The standard solution without the addition of silver could match with alloy samples. The recovery ratios of synthetic sample were 95%～105%, the relative standard deviation were 0.5 for Sn and Cu, 1.0 for La. While the concentration of the matrix was 2mg/ml, the detection ranges were(%):11～45, 7～30 and 0.5～0.15 for tin ,copper and lanthanum, respectively. 