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2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚(简称5-Br-PADAP)是很灵敏的显色剂,它已用于光度法测定铜、锰、铀、铑等多种离子,都获得了满意的结果。本文系统地研究了Os(Ⅷ)-5-Br-PADAP-OP(OP的全名为聚乙二醇辛基苯基醚)体系的显色反应条件及用于光度法测定锇(Ⅷ)的可能性。实验证明,在非离子表面活性剂OP的存在下,锇(Ⅷ)与5-Br-PADAP形成可溶于水的紫红色络合物,最大吸收波长在580nm,反应适宜
2- (5-Bromo-2-pyridylazo) -5-diethylaminophenol (referred to as 5-Br-PADAP) is a very sensitive developer that has been used for the spectrophotometric determination of copper, manganese, uranium, And many other ions, have been satisfied with the results. This article systematically studied the color reaction conditions of Os (Ⅷ) -5-Br-PADAP-OP (OP’s full name polyethylene glycol octylphenyl ether) system and its application in the spectrophotometric determination of osmium (Ⅷ) possibility. Experiments show that in the presence of non-ionic surfactant OP, osmium (Ⅷ) and 5-Br-PADAP form water-soluble fuchsine complex, the maximum absorption wavelength at 580nm, the reaction is suitable