COD测定仪法测定不同水样COD消解时间的差异性  

Study on Differential Digestion Times of COD in Different Water Samples by the COD Analyzer

作　　者：丁佳 

机构地区：[1]绍兴市环境监测中心站,浙江绍兴312000

出　　处：《环境监控与预警》2015年第6期38-41,共4页Environmental Monitoring and Forewarning

摘　　要：通过实验证实COD测定仪法具有较好的精密度和准确性,与标准回流法的分析结果比较,相对误差为-3.37%～1.41%,具有替代标准回流法的可行性。由于水样性质不同,所需最佳消解时间不同,通过比较不同消解时间下COD测定的结果,得到COD测定仪法测定水中COD所需的最佳消解时间分别为：工业废水60 min,生活污水和地表水90 min。The experiment confirmed that the COD analyzer had good precision and accuracy. Compared with the standard reflux method, the relative errors were ranged from -3.37% to 1.41%. It could be used as an alternative to the standard reflux method. Due to the difference in the nature of water samples, the optimal COD digestion time is different. By comparing the COD results at different digestion times, the optimal digestion times using the COD analyzer were 60, 90, and 90 min for industrial waste water, domestic wastewater, and surface water, respectively.

关 键 词：COD测定仪法 消解时间 工业废水 生活污水 地表水 

分 类 号：O657.32[理学—分析化学]