新试剂3,5-二溴-4-偶氮-8-羟基喹啉苯基荧光酮与锆(Ⅳ)显色反应的研究及应用

Colour Reaction of 3,5-Dibromo-4-(8-hydroxy-5-quinolylazo)phenylfluorone with Zirconium and Its Analytical Application

研究了新显色剂3,5-二溴-4-偶氮-8-羟基喹啉苯基荧光酮(DBAHQPF)在溴化十六烷基三甲铵(CTMAB)存在下,与锆(Ⅳ)形成红色络合物的条件,其λ_(max)^(MR)=538nm,ε_538nm=1.72×10~5,锆(Ⅳ)浓度在0～10μg/25ml 范围内服从比尔定律。拟定方法已用于直接测定铝合金样品中痕量锫,结果满意。

In the presence of CTMAB the colour reaction of a new organic reagent 3,5-dibromo-4-(8-hydroxy-5- quinolyazo)phenylfluorone with zirconium(Ⅳ)has been studied,the λ_(max)^(MR)=538nm,ε_(538nm)=1.72×10~5L·mol^(-1)·cm^(-1). Beer's law is obeyed in the range of 0—10μg/25ml for zirconium.This method has been used directly for the determination of zirconium in aluminium alloy with satisfactory results.