Pd(Ⅱ)-p-NBR-CTMAB分光光度法测定微量钯

Spectrophotometric Determination of Micro Amounts of Palladium with p-NBR

在 (1+ 10 )的盐酸介质中 ,CTMAB存在下 ,Pd( )与新试剂 5 - (p-硝基苄叉 )若丹宁 (p- NBR)反应生成 1∶ 2黄色稳定的络合物 ,λmax=4 5 0 nm,ε=6 .0 5× 10 4L· mol-1· cm-1,钯的含量在 0— 18μg/ 2 5 m L范围内符合比耳定律。方法用于以碳为载体的钯催化剂中微量钯的测定 。

p-nitrobenzylidene) rhodanine(p-NBR) reacts with palladium in the solution of (1+10) HCl including CTMAB,and forms a 2∶1 yellow complex with λ max=450nm and ε=6.05×10 4L·mol -1·cm -1.Beer's Law was obeyed in range of 0-18μg/25mL of palladium.This method was used to determine micro amounts of palladium in catalysts with satisfactory results.