关于含低CODcr、高CL^-稀土废水中CODcr的测定方法探讨

APPROACH ON DETERMINATION OF CODcr IN THE WASTE WATER WITH LOWCONCENTRATION OF CODcr AND HIGH CONCENTRATION OF CL^-

本文通过实验研究 ,提出用低铬法 ( 0 .0 2 5 0mol/L)测定稀土废水中的CODcr ,该方法测定结果和高铬法比较误差较小 ,准确度提高 ,并给出了低铬法测定稀土废水中CODcr时 ,HgSO4最佳使用量。

Through the researches in laboratory with low chrome method of 0.025mol/L to determine the CODcr in the waste water, it showed that error was smaller and accuracy was higher compared with the high Chrome method. The optimal volume of HgSO 4 was finalized when low Chrome method to determine the CODcr of rare-earth wastewater was adopted.