5-(3-苯甲酸偶氮)-8-氨基喹啉与钯显色反应及其应用

Study on Color Reaction of 5-(3-Carboxylphenylazo)-8-aminoquinoline with Palladium(Ⅱ)

在弱碱性介质中，ＣＴＭＡＢ微乳液存在下，５－（３－苯甲酸偶氮）－８－氨基喹啉（ＣＰＡＱ）与钯（Ⅱ）生成３：１蓝色络合物，λｍａｘ＝６２５ｎｍ，ε＝９.４０×１０４。钯的含量在０－２０μｇ／２５ｍＬ内符合比尔定律。方法用于钯催化剂中钯的测定，结果满意。

In the presence of CTMAB microemulsion, Pd(Ⅱ) can reacts with 5-(3-carboxylphenylazo) -8-amino quinoline to form a blue 1:3 complex in alkaline solution.The molar absorptivity is 9.40×10~4L·mol-1·cm-1 at 625nm. Beer's law is obeyed in the range of 0-20μg Pd(Ⅲ)/25mL. This method can be applied to the determination of palladium in catalyst with satisfactory results.