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合金中高含量元素的测定,过去常用化学法,其结果虽准确但操作烦琐,原子吸收法是一种简便、快速、灵敏度高和选择性好的分析方法。在测定高含量元素时,一般使用稀释,选择次灵敏线及改变燃烧器角度的方法,本文介绍用次灵敏吸收线和空气一液化石油气火焰的方法来测定锡合金中的高含量铟。在最佳的实验条件下,使用改装的Wang燃烧器头和标准加入法在国产750型原子吸收分光光度计上进行试验,最后与络合滴定法进行比较,得到分析结果比较满意,相对误差不超过0.5%回收率为99.5～100.5%。
Determination of high concentrations of elements in the alloy, the chemical method used in the past, although the accuracy of the results but the operation cumbersome, atomic absorption method is a simple, rapid, high sensitivity and selectivity of the analytical method. In the determination of high content of elements, the general use of dilution, select the second sensitive line and change the burner angle method, this article describes the use of sub-sensitive absorption lines and air-liquefied petroleum gas flame method to determine the high content of indium tin alloy. In the best experimental conditions, the modified Wang burner head and the standard addition method in the domestic 750 atomic absorption spectrophotometer test, and finally compared with the complexometric titration, the analysis results are satisfactory, the relative error is not Over 0.5% recovery was 99.5 ~ 100.5%.