摘要
本文研究了杜与对马尿酸偶氮氯膦（ｐＨＡ－ＣＰＡ）络合物的形成条件及其在光度分析中的应用。实验证明，钍与ｐＨＡ－ＣＰＡ形成络合比为１：３的蓝紫色络合物，λ＿（ｍａｘ）＝６８０ｎｍ，ε＝９．６３×１０￣４。该方法用于测定稀土矿中微量钍，结果良好。
he Color reaction of thorium withcmorophosphonazo p-aminohippuric acid wasstudied,It has been proved that the blueblack cornplex of thorium with chlorophos-phonazo p-aminohippuric acid is formed withmaximum absorption at 680nm, The molarabsorptivity is 9.63 × 10￣4L·mol￣(-1)·cm￣(-1)。The molar ratio of thorium to chlorophos-phonazo is 1 :3. The method can be used todetermine trace thorium in rare earth miner-als and good results have been obtained.
出处
《分析试验室》
CAS
CSCD
北大核心
1995年第3期47-49,共3页
Chinese Journal of Analysis Laboratory
关键词
马尿酸
偶氮氯膦
分光光度法
钍
稀土矿
Thorium determination:chlorophosphonazo p-aminohippuric acid
spectrophotometry.
