硫氰酸盐分光光度法测定钨是在盐酸溶液中,利用三氯化钛作还原剂将钨全部还原为钨(Ⅴ),再与硫氰酸盐显色作用形成黄色络合物[1]。本文就其稳定性和准确度方面进行了探索,究其酸度和EDTA的用量进行研究。结果表明该方法的稳定性和重复性得到了很大的提高,且测定成本低廉。 Thiocyanate spectrophotometric determination of tungsten in hydrochloric acid solution, the use of titanium trichloride as a reducing agent to reduce all of tungsten to tungsten (V), and thiocyanate color formation yellow complex [1] . In this paper, its stability and accuracy were explored, the acidity and the amount of EDTA were studied. The results show that the stability and repeatability of the method have been greatly improved, and the measurement cost is low.