XO螯合形成纤维分离富集微量锆铪性能的研究

SEPARATING AND PRECONCENTRATING Zr AND Hf FROM SOLUTION BY XYLENOL ORANGE CHELATE FIBRE

本文采用先螯合后吸着的方法,研究了XO螯合形成纤维分离富集微量锆铪的性能。试验研究表明,该纤维能富集浓度低至0.04ppm的锆铪,并且能与大量基体元素相分离;当锆铪总量约为0.41ppm时,采用本方法九次测定的标准偏差为0.21,变异系数为1.05％;回收率可达99.24％。该方法具有操作简便、交换速率快、干扰少、富集能力强、成本低等特点,适用于成分较复杂样品中微量锆铪的分离和富集。

The trace elements zr and Hf can be separated from matrix solution by Xyienel Orange (XO) chelate fibre. The method of firstly ehelation and secondly adsorption was applied.Our experiments show that the separation and preconcentra-tion of Zr and Hf by XO chelate fibre can be effectively carried out even at a concentration of Zr and Hf down to 0.04ppm from large quantities of matrix. The precision and accuracy of the method had been tested. When concentration of Zr and Hf in analyzed solution was about 0.4lppm,the standard deviation was 0.21 in average of nine tests,and the relative standard deviation was 1.05%, recovery was up to 99.24%.This method was characterized by fast rate, little inter-element interference, great times of preconcentrating Zr and Hf, and low cost. It can be applied with satisfactory result.