试剂2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚(5-Br-PADAP)在国内已有商品出售,是一种高灵敏的显色剂。Γусев等曾提到过5-Br-PADAP和三价铊的反应,但未对此反应作深入的研究。本文对络合物的形成条件及其某些性质作了较深入的研究并讨论了应用的可能性。 Reagent 2- (5-Bromo-2-pyridylazo) -5-diethylaminophenol (5-Br-PADAP) is sold in China as a highly sensitive developer. Γусев et al. Mentioned the reaction of 5-Br-PADAP and trivalent thallium, but did not make further research on this reaction. In this paper, the complex formation conditions and some properties of a more in-depth study and discussed the possibility of application.