还原催化剂中SnO_2含量测定的样品前处理

SAMPLE′S PRETREATMENT FOR THE DETERMINATION OF SnO_2 IN CATALYST

对某还原性催化剂样品前处理方法进行研究。将样品在加热条件下用硫酸溶液(2∶1)分解,样品处理后用EDTA络合滴定法测定其中SnO2的含量,平均回收率为100.1%,测定结果的相对标准偏差为0.65%(n=9)。

Sample＇s pretreatment for the determination of SnO2 in a catalyst was studied. The sample was heated and decomposed in H2SO4 solution （ 2 ： 1 ） , and the complexometry was used to determine the content of SnO2. The average recovery was 100.1% , and RSD was 0.65% （n =9）.