氯气校正法测定高氯水样CODCr的实验条件探讨

Discussion on Experimental Conditions for CODCr Measurement of High Chloride Water by Chlorine Emendation Method

氯气校正法测定高氯水样的CODCr,其实验装置复杂,对实验条件要求比较严苛。本论文针对氯气校正法的实验条件开展相关研究,通过梯度对比实验,确定加热功率为250W^300W,氮气流速为5~10 ml/min,且在整个加热消解过程中保持稳定的加热功率和氮气流速,可保证氧化总量和氯气吸收量的相对平衡,满足对高氯废水样品的CODCr测试需求。

The experimental equipment of CODCrmeasurement of high chloride water by chlorine emendation method is complicated,and its experimental conditions are strict.This article researches on experimental conditions for chlorine emendation method.By contrast tests,we appointed the heating power as 250 W^300 W,and nitrogen flow as 5~10 ml/min.During the sample digestion,the heating power and nitrogen flow should remain stable,which guarantees the relative equilibrium of oxide aggregate and chlorine absorption.