2-(2-喹啉偶氮)-1,3-二氨基苯光度法测定钯的研究

Spectrophotometric Determination of Palladium with 2-(2-Quinolinylazo)-1,3-Diaminobenzene

合成了新试剂2-(2-喹啉偶氮)-1,3-二氨基苯(QADAB),并研究了其与钯的显色反应,在0.2～3.0mol/LHClO4介质中,QADAB与钯反应生成2:1稳定络合物,体系λmax=590nm,ε=8.08×104L·mol-1·cm-1。钯含量在0.01～1.2mg/L内符合比尔定律。本方法用于一些含钯样品中钯含量的测定,结果令人满意。

quinolinylazo)-1,3-diaminobenzene(QADAB)was synthesized, and its color reaction with palladium(II) was studied. In the presence of 0.2 ～ 3.0 mol/L perchioric acid, QADAB reacted with palladium(II) to form a stable 2:1 complex. The molar absorptivity of the complex was 8.08×104L·mol-1cm-1 at 590 nm. Beer’s law was obeyed in range of 0.01～1.2mg/L. This method was applied to the determination of palladium(II) in real samples with good results.