摘要
不同的试验条件对化学需氧量检测结果会产生一定影响,《水质化学需氧量的测定重铬酸盐法》(HJ 828—2017)的化学需氧量测试步骤中并没有规定具体的消解温度。结合水质检测工作实际,研究了消解温度在化学需氧量测试过程中的影响。结果表明,消解温度对化学需氧量检测结果的精密度和准确度存在很大影响,不同消解仪采用的消解温度稍有差别,温度的设定应根据仪器本身性能调节,获得最佳的消解温度。当消解温度为220~230℃时,化学需氧量测试结果准确。
Different experimental factors have some influences on the test results during the determination of chemical oxygen demand,there is no specific digestion temperature specified in the test chemical oxygen demand of“Water quality-determination of the chemical oxygen demand-Dichromate Method(HJ 828—2017)”.Combined with the actual water quality test,the effect of digestion temperature on COD testing was studied.It was found that digestion temperature would affect the precision and accuracy of COD determination results greatly,the digestion temperatuer of different digesters might be slightly different,and should be regulated according to the performance of the instrument itself to obtain the best digestion temperature.It can be accurately tested when the digestion temperature is 220~230℃.
作者
陈素林
蒋玲
邱雅婷
唐菁谦
黄建锋
陈革伟
张舒硕
Chen Sulin;Jiang Ling;Qiu Yating;Tang Jingqian;Huang Jianfeng;Chen Gewei;Zhang Shushuo(Changsha Economic and Technical Development Zone Water Purification Engineering Co.,Ltd.,Changsha 410129,China)
出处
《山东化工》
CAS
2023年第5期140-142,共3页
Shandong Chemical Industry
关键词
重铬酸盐法
化学需氧量
水质检测
准确度
dichromate method
chemical oxygen demand
water quality testing
accuracy
