重铬酸盐法与快速消解分光光度法测定化学需氧量的对比  

Comparison of Dichromate Method and Rapid Digestion Spectrophotometry for Determination of Chemical Oxygen Demand

作　　者：赵悦 李贺 刘娟[2] 陈云霞[2] 郑君[2] 李美丽 王佳荣 商静静 ZHAO Yue;LI He;LIU Juan;CHEN Yunxia;ZHENG Jun;LI Meili;WANG Jiarong;SHANG Jingjing(C C Tech(Beijing)Co.,Ltd.,Beijing 100176,China;Chinese Academy of Inspection and Quarantine,Beijing 100176,China)

机构地区：[1]中检科(北京)化妆品技术有限公司,北京100176 [2]中国检验检疫科学研究院,北京100176

出　　处：《化工管理》2024年第6期59-62,共4页Chemical Engineering Management

摘　　要：文章通过对重铬酸盐法和快速消解分光光度法检出限、精密度、正确度和不同行业的实际样品的分析,以及操作过程中的试剂前处理、操作步骤、消解时间、计算公式、产生废液量及实验效率的比较,着重讨论了两种检测方法的准确性与适用性。经分析可知,两种检测方法对实际水样中COD的测定结果相近。检出限、精密度、正确度均符合检测方法的要求,结果无明显差异。快速消解分光光度法所用试剂无需前处理、仪器操作简单、消解时间短、实验结果直接读取无需计算且产生废液量少,实验效率更高,在大批量快速检测或突发检测中的适用性远高于重铬酸盐法。This paper were analyzed the detection limit,precision,trueness and actual samples of different industries were analyzed by bichromate method and fast digestion spectrophotometry,as well as the reagent pretreatment,operation steps,digestion time,calculation formula,the amount of waste liquid produced and experimental efficiency were compared.The accuracy and applicability of the two detection methods are emphatically discussed.It can be seen from the analysis that the results of COD determination in actual water samples by the two detection methods are similar.The detection limit,precision and trueness meet the requirements of the detection method,and there is no obvious difference in the results.The reagent used in fast digestion spectrophotometry does not need to be pre-treated,the instrument is simple to operate,the digestion time is short,the experimental results are read directly without calculation and the amount of waste liquid is less,the experimental efficiency is higher,and the applicability of rapid detection in large quantities or burst detection is much higher than that of dichromate method.

关 键 词：化学需氧量 重铬酸盐法 快速消解分光光度法 

分 类 号：X832[环境科学与工程—环境工程]