我们承担硫磷铝锶矿测定稀土总量的任务,由于冶炼试验稀土经富集后含量越来越高。目前我们所采用的二甲酚橙三元络合物快速比色法不能适应高含量稀土的测定。本文用二乙三胺五醋酸(DTPA)作滴定剂,用加掩蔽剂消除干扰的办法,基本上 We undertake the determination of the total amount of rare earths parathionite paraffin task, due to the enrichment of the smelting test rare earth content is higher and higher. At present, we used xylenol orange ternary complex rapid colorimetric method can not adapt to the determination of high content of rare earth. In this paper, diethylenetriamine pentaacetic acid (DTPA) as a titrant, with masking agent to eliminate interference, basically