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铟的比色測定一般多采用8-羟基喹啉法,但該法不够灵敏,且特效性亦差,添加各种隐蔽剂于比色液中,虽可以增加它的特效性,但却使反应的灵敏度降低,且遇干扰元素含量大时,仍不能彻底消除。因此,寻找更灵敏及有足够特效性的铟的比色方法是有实际意义的。鉴于若干种硷性有机染料——甲基紫、蔷薇红B等能与铟同族的几种元素的鹵素絡合酸——HGaCl_4、HTlCl_4、HTlBr_4,产生固相顏色反应,可用于这些元素的比色方法,作者亦探索了某些有机硷与铟的卤素絡合酸间固相顏色反应的可能性,发現結晶紫在硫酸溶液中与碘化铟絡离子生成的有色化合物,易溶于苯,呈稳定的蓝紫色,且反应很灵敏。結晶紫与碘离
Indium colorimetric determination of the general use of 8-hydroxyquinoline method, but the method is not sensitive enough, and the special effects are poor, add a variety of concealment agent in the colorimetric solution, although it can increase its special effects, but the reaction The sensitivity decreases, and in case of interference element content, still can not be completely eliminated. Therefore, the search for more sensitive and sufficient effect of indium colorimetric method is of practical significance. In view of a number of basic organic dyes - methyl violet, rose B and other indium similar to several elements of the halogen complex acids - HGaCl_4, HTlCl_4, HTlBr_4, produce solid color reaction can be used for these elements than Color method, the authors also explored the possibility of the solid-phase color reaction between some organic bases and indium halogen-complexing acids. It was found that the crystal violet is a colored compound formed by complexing with indium iodide complex ions in sulfuric acid solution and is easily soluble in benzene , Was stable blue-purple, and the reaction is very sensitive. Crystal violet and iodine