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已报导测定三氧化钨及三氧化钼中铜、钴、镍的分光光度法均为分别测定,都需预萃取分离。现有同时测定该三元素的分光光度法,所用试剂不常见,测定波长在紫外区应用不便,并且尚未用于本文样品分析。本文根据1-(2-吡啶偶氮)-2-萘酚(PAN)能与铜(Ⅱ)、钴(Ⅱ)、镍(Ⅱ)形成难溶于水的有色络合物这一特性,研究了该试剂定量沉淀及同时分光光度法测定该三元素的条件。利用PAN既作沉淀富集剂又作显色剂,拟定了同时分光光度测定三氧化钨及三氧化钼
It has been reported that the spectrophotometric determination of copper, cobalt, and nickel in tungsten trioxide and molybdenum trioxide has been separately determined and pre-extracted and separated. The existing simultaneous determination of the three elements of spectrophotometry, the reagents used are not common, the determination of wavelength in the UV application inconvenience, and has not been used for the sample analysis. In this paper, based on the characteristic that 1- (2-pyridylazo) -2-naphthol (PAN) forms a hardly soluble color with copper (Ⅱ), cobalt (Ⅱ) and nickel (Ⅱ) The reagent quantitative precipitation and simultaneous spectrophotometric determination of the three elements of the conditions. The use of PAN both as a precipitation enrichment agent and as a developer, the simultaneous development of spectrophotometric determination of tungsten trioxide and molybdenum trioxide