热分解-电化学法测定印染废水中的总氮

为解决总氮测量方法(HJ 636-2012)存在的问题,建立了热分解-电化学法并应用于检测印染废水。结果表明,热分解-电化学法的检测范围为0~200.00 mg/L,检出限为0.025 mg/L,测量印染废水水样的相对标准偏差为3.0%~4.1%,加标回收率为98.9%~101.5%。与HJ 636-2012方法比较,热分解-电化学法具有测量简便快捷、干扰因素少、检测范围广和灵敏度高等优点。

Determination of total nitrogen in printing and dyeing wastewater by thermal decomposition-electrochemical method

To solve the problems existing in current total nitrogen measurement method(HJ 636-2012),thermal decomposition-electrochemical method was established and applied to the detection of printing and dyeing wastewater. The results showed that the detection range of thermal decomposition-electrochemical method was 0~200.00 mg/L, and the detection limit was 0.025 mg/L. The RSD of printing and dyeing wastewater samples was 3.0%~4.1%, and the recovery rate was 98.9%~101.5%. Compared with the method of HJ636-2012, thermal decomposition-electrochemical method had the advantages of simple and quick measurement, less interference factors, wide detection range and high sensitivity.