1-(间硝基苯基)-3-(2-氨基噻唑)三氮烯与钯Ⅱ的显色反应及其分析应用

Color Reaction of Palladium? with a New Triazene Reagent 1-(m-Nitrophenyl)-3-(2-aminothiazole) triazene and Its Analytical Applications

研究了一个新的三氮烯类试剂 :1 (间硝基苯基 ) 3 (2 氨基噻唑 )三氮烯 (m NPATT) ,在Tween80存在下与钯 显色反应。结果表明 ,在pH 8 0～ 10 0范围内 ,钯 与m NPATT形成 1∶2的稳定络合物 ,其表观摩尔吸光系数在 475nm处为 6 82× 10 4 。钯量在 0 10～ 10 0 μg/ 10mL范围内符合比尔定律。对 30多种共存离子进行了试验 ,除Cu2 +,Ag+,Cd2 +,Hg2 +稍有干扰外 ,其余离子均不干扰测定。用该方法测定了催化剂中钯的含量 ,结果满意。

A color reaction between palladium? and a new triazene group reagent:1 (m nitrophenyl) 3 (2 aminothiazole)triazene(m NPATT) was firstly studied m NPATT can react with Pd? in the medium of pH 8 0 10 0 to form a complex(molar ratio 2:1),which exhibits intensive absorbance at λ max =475nm Beer’s law is obeyed in the Pd? concentration range of 0 10-10 0μg/10mL with the apparent molar absorptivity of 6 82×10 4L·mol -1 ·cm -1 Except Cu 2+ ,Ag +,Hg 2+ and Cd 2+ ,no other foreign ions interfere with the determination [less than 10-fold concentration of Pd?] The method is relatively sensitive and good selective,it has been successfully used to the determination of palladium in catalysts