高氯水体中COD测定的氯耗氧曲线校正法分析

Chloride Oxygen Demand Calibration Curve Applied to COD Determination in High Chloride Water

中文关键词:  COD  Cl-  氯耗氧曲线

英文关键词:COD  Cl-

中文摘要:

      介绍了一种重铬酸钾法测定高氯水体中COD的改进分析方法——氯耗氧曲线校正法，测定中不加隐蔽剂HgSO4，通过调整催化剂Ag2SO4的加入时间，测得表观COD值，再扣除Cl^-对COD的贡献值，得出实际COD值。与标准方法相比，该法准确度高、精密度好，还可避免汞盐污染环境。

英文摘要:

      An improved method, chloride oxygen demand calibration curve applied to COD determination in high chloride water, is proposed in the paper. Not using masking agent HgSO4, the method gets apparent COD value by adjusting adding step of catalyst Ag2SO4, then actual COD value by removing chlorides contribution. Compared with standard method, the method has better accuracy and precision, and can avoid mercury contamination into environment.