原子吸收光谱法测定脱氢催化剂中铂

Determination of Platinum in Dehydrogenation Catalyst by Flame Atomic Absorption Spectrometry

建立了火焰原子吸收光谱法测定脱氢催化剂中铂含量的方法。在聚四氟乙烯压力溶弹内用王水溶解试样。考察了２４种共存离子的干扰情况，试验表明，通过在试液中同时加入Ｌａ３＋、Ｃｕ２＋可以消除２１种离子的干扰。加标回收率在９８．３％～１０１．６％之间，相对标准偏差小于２．３％。

A new method to determine platinum from dehydrogenation catalyst with FAAS was proposed. The sample of dehydrogenation catalyst was digested with HCl-HNO 3(3:1), and then dissolved in water. The interference from other twenty-four metal ions was investigated and the method to eliminate interference was suggested. The recovery of platinum is 98.3 %～101.6 % and the relative standard deviation is less than 2.3%.