矿石中痕量钽的光度法测定

Spectrophotometric Determination of Tantalum in Ores

本文对钽—水杨基萤光酮(SAF)—氯化十六烷基吡啶(CPC)三元有色络合物的稳定性作了研究,发现在动物胶存在下,发色后,于沸水浴上保温五分钟,有色络合物可稳定两小时。络合物的摩尔比为Ta:SAF:CPC=1:2:2(510nm),在拟定的条件下可用于含铌钽矿物中钽的测定。

The stability of complex formed among tantalum(V)and salicylfluorone and cetylpyridinium chloride in the presesnce of gelatin has been studied.The color complex is stable in two hours.A complex with a molar component ratio of Ta:SAF:CPC=l:2:2(510nm)is formed.Conditions have been established for determining tantalum in tantalum-niobium ores The coefficient of variation of the method is between 3.16%(Ta=0.25%)and 7.7%(Ta=0.0056%).