重铬酸钾法测定废水样品化学需氧量

Determination of Chemical Oxygen Demand of Waste Water with K_2Cl_2O_7 Method

对重铬酸钾法测定废水样化学需氧量(CODC r)存在的问题进行分析,采取正交实验优选出MnSO4为0.2g,硫磷混酸体积比为1∶5,回流时间为1 h的最佳试验方法,用MnSO4代替Ag2SO4作为催化剂,可减少试验时间,经检验效果良好。

To analyze the problems existing in determination of chemical oxygen demand of waste water sample with K2Cl2O7 method（ CODcr）. Adopting orthogonal experiment to optimize, the optimum test method is that the quantum of MnSO4 is 0.2 g, the volume proportion of mix acid of H2SO4 and H3PO4 is one fifth, the circumfluence time is 1 hour. Substituting MnSO4 for Ag2SO4 as catalyzer can shorten test time, which is good effect by inspection.