摘要
本文基于在pH4.1 HAc—NaAc缓冲溶液中及活化剂氨三乙酸存在下,Mn(Ⅱ)对KlO_4氧化盐基品红缓慢褪色反应的强烈催化作用,采用固定时间法,以KCNS中止反应,拟定了一个锰的催化光度分析法,其检出限和测定范围分别为0.08ng/ml和O.20～20ng/ml.该方法选择性好、操作简便.用于铝合金、废水中痕量锰的测定,结果尚好.
A new catalytic spectrophatoxmetric method for trace Mn determination is described. It pos-sesses high sensitivity, good selectivity, wide determination, range, short analysis time and convenient operation. The method is based on the slow reaction of fuchsia (max=545nm) and KI04, catalyzed by Mn(Ⅱ), in the presence of nitroltriacetate acid and in pH4.1 acetate buffer solutions at 25×1, KCNS is cho,sen as ceasing reaction reagent. The detection limit is 0.08ng/ml and determination range is between 0.2 and 20ngMn/ml by the fixed time metho'd. The method is applied to determine Mn in Al allo'y and waste water samples.
出处
《冶金分析》
CAS
CSCD
北大核心
1991年第4期20-22,共3页
Metallurgical Analysis
