4-(H酸偶氮)-1-苯基-3-甲基吡唑啉酮与钍的显色反应及其应用  

Color Reaction of 4-(H-acidazo)-l-phenyl-3-methylpyazolone with Thorium and Its Application

作　　者：尹家元[1] 汤丹瑜[1] 杨光宇[1] 古昆[1] 邬春华[1] 

机构地区：[1]云南大学化学系,昆明650091

出　　处：《分析化学》1999年第8期904-906,共3页Chinese Journal of Analytical Chemistry

摘　　要：研究了新试剂4-(H酸偶氮)-1-苯基-3-甲基吡唑啉酮(HAPMP)与钍的显色反应.在pH=5.0的HAc-NaAc缓冲介质中,阳离子表面活性剂CFMAB存在下,HAPMP与Th(Ⅳ)反应生成2:1红色络合物,λ_(mas)=55nm,ε=2.24×10~5 L·mol^(-1)·cm^(-1).钍(Ⅳ)含量在0～640μg/L内符合比定律,方法用于合金中钍的测定,结果令人满意.The color reaction of 4-(H-acidazo)-1-phenyl-3-methylpyazolone with thorium was studied. In pH 5.0 aqueous solution in the presence of Cetyl trimethyl ammonium bromide, HAPMP can reacts withTh( Ⅳ) to form a 2:1 stable complex. The molar absorptivity is 2.24×105 L·mol-1·cm-1 at 550 nm.Beer's law is obeyed in the range of 0～640 μg/L. This method has been applied to the determination ofthorium in alloy with satisfactory result.

关 键 词：HAPMP 钍 光度法 测定 显色反应 

分 类 号：O614.42[理学—无机化学]