一、引言铋、锡、铅、锑、砷等低熔点金属,残存于高温合金中,对合金性能有很大的影响。因此,要求严格控制和准确测定它们的含量。采用化学分离光谱测定的方法,是由于合金中基体元素被分离,杂质得到浓缩,既提高光谱测定的灵敏度;又消除基体效应,也可用纯试剂合成标样,解决了光谱标准样品问题,是目前一种通用的方法。过去使用硫化氢分离手段,或用硫化物共沉测定杂质元素, I. Introduction Bismuth, tin, lead, antimony, arsenic and other low melting point metals, remaining in the superalloy, the alloy performance has a great impact. Therefore, strict control and accurate determination of their content are required. The method of chemical separation spectrophotometry is because the matrix element is separated and the impurities are concentrated in the alloy, which not only improves the sensitivity of the spectrometry but also eliminates the matrix effect, and also can synthesize the standard sample with the pure reagent to solve the problem of the spectral standard sample, which is currently A common method. In the past the use of hydrogen sulfide separation means, or by sulfide co-precipitation determination of impurity elements,