微波消化-分光光度法测定铂

Microwave Digestion and Spectrophotometric Determination of Platinum

在盐酸介质中对氨基苯基亚甲基若丹宁 (ABR)与铂的显色反应 ,生成 2∶ 1稳定络合物 ,λmax=5 2 5 nm,ε=5 .98× 10 4L·mol-1·cm-1。铂含量在 0— 5 0 μg/ 2 5 m L范围内符合比耳定律 ,方法可用于催化剂中铂含量的测定。

In the presence of hydrochloric acid solution,platinum reacts with p-aminobenzylidenerhodanine(ABR) and forms a 2∶1 stable complex with molar absorptivity of 5.98×10 4L·mol -1 ·cm -1 at 525nm.Beer's law is obeyed in the range of 0-50μg/25mL.This method was applied to the determination of platinum in catalyst with good results.