工业废水中COD含量的分析方法  

Analysis Method of COD Content in Industrial Wastewater

作　　者：安静 AN Jing(Shenghong Refining(Lianyungang)Co.,Ltd.,Lianyungang 222000,China)

机构地区：[1]盛虹炼化(连云港)有限公司,江苏连云港222000

出　　处：《化工管理》2021年第35期19-20,共2页Chemical Engineering Management

摘　　要：文章研讨了工业废水中的COD含量问题,以及借助气相分子吸收光谱法对A、B两工厂工业废水中的COD含量实施一种定量分析方法。与国标中传统的高锰酸钾滴定法相比,该分析方法有着耗时短、操作简单、劳动强度小的优点。在精确度方面,可以很好的满足国家标准,即平行测定结果的绝对差值不大于0.5 mg/L。该方法的线性相关系数可达0.9993,定量下限为1.0 mg/L,重复测定的相对标准偏差≤1%,与国标中传统的高锰酸钾滴定法相比较相对误差约为1%,结果有很好的一致性,同时满足一般水样的加标回收率在95%~105%之间的要求。This paper discusses the problem of COD content in industrial wastewater,and implements a quantitative analysis method for COD content in industrial wastewater from factories a and B by means of gas phase molecular absorption spectrometry.Compared with the traditional potassium permanganate titration method in national standard,it has the advantages of short time consuming,simple operation and low labor intensity.In terms of accuracy,it can well meet the national standard,that is,the absolute difference of the results of parallel determination is not more than 0.5 mg/L.The linear correlation coeff icient of this method is 0.9993,the lower limit of quantif ication is 1.0 mg/L,and the relative standard deviation of repeated determination is less than 1%.Compared with the traditional potassium permangnoate titration in national standard,the relative error is about 1%.The results have good consistency,and the standard recovery of general water sample is between 95%and 105%.

关 键 词：化学需氧量 工业废水 气相分子吸收光谱法 含量分析 

分 类 号：X703[环境科学与工程—环境工程]