极谱法测定硫酸稀土复盐母液中的稀土总量

DOLAROGRAPHIC DETERMINATION OF RARE EARTH CONTENT IN MOTHER-LIQUOR OF COMPLEX SALT RARE EARTH SULFATE

在pH9.0的NH3·H2O-(NH4)2SO4缓冲介质中,RE(Ⅲ)-TP的络合吸附波的波高与RE(Ⅲ)的浓度在0-10μg/mL间成线性。该方法的相对标准偏差2.23%,回收率99.51%-103.38%,用于硫酸稀土复盐母液中微量稀土总量测定,结果满意。

In NH_3·H_2O-(NH_4)_2 SO_4 buffer solution at pH 9.0,the wave height of the complex of RE(Ⅲ) with thymolpthalexon is proportional to the concentration of RE(Ⅲ) in the range of 0-10 μg/mL.This method was applied to the determination of the total contents of rare earth in mother-liquor of complex Salt rare earth Sulfate With RSD,2.23%,and recovery,99.51%-103.38%.