摘要
氯离子是影响水中化学需氧量测定结果准确性的主要干扰因素。当废水中氯离子浓度在2000～8000mg/L时,采用以氯离子浓度为横坐标,其干扰产生的化学需氧量值为纵坐标绘制标准曲线的方法,测定氯离子影响化学需氧量值,用重铬酸钾法的测定值减去氯离子的影响值,得到实际样品的化学需氧量,结果令人满意。
The chloride ion is the main interference factors that affect the water chemical oxygen demand determining result accuracy. When chloride ion concentration in waste water is at 2 000 - 8 000 mg/L, adopts chloride ion concentration as the x-coordinate, the value of chemical oxygen demand by its disturbance as the y-coordinate, to determine the chlorine ion affecting chemical oxygen demand value by drawing the standard curve, and then with the determining value given by dichromate method minus the influence value of chloride ion, the chemical oxygen demand of actual sample is obtained and the results are satisfactory.
出处
《环境保护与循环经济》
2009年第1期38-39,共2页
environmental protection and circular economy
关键词
重铬酸钾法
化学需氧量
氯离子影响
标准曲线
dichromate method
chemical oxygen demand
affects of chloride ion
standard curve
