分光光度法测定海水样品化学耗氧量的研究  

A spectrophotometric method for measuring COD in seawater

作　　者：刘莹[1] 李兆新[2] 耿霞[2] 冷凯良[2] 姬泓巍[1] 

机构地区：[1]中国海洋大学,青岛266003 [2]中国水产科学研究院黄海水产研究所,青岛266071

出　　处：《海洋水产研究》2006年第5期62-67,共6页Marine Fisheries Research

基　　金：国家科技攻关计划项目(2002BA906A39)资助

摘　　要：研究了海水中化学耗氧量的分光光度测定方法,并用分光光度法和碘量法分别对3种不同COD浓度水平的葡萄糖标准溶液(COD=0.5、1.5、2.5mg/L)以及两种海水水样进行分析。结果表明,两种方法的测定结果没有显著性差异,分光光度法测定结果的相对标准偏差小于2.7%,回收率在96.3%～103.8%之间,表明该法测定海水中COD可行,且方法操作简便,更适宜于海上自动化分析。A spectrophotometric method was studied for measuring the chemical oxygen demand （COD） in seawater. In this method, 470 nm was chosen as the measuring wavelength, then 3 standard glucose solutions of COD （COD=0.5, 1.5, 2.5 rag/L） and 2 seawater samples （the South Yellow Sea and Jiaozhou Bay） were measured by the spectrophotometric method and titrimetric method. The results showed that there was no significant difference between both of the methods, the relative standard deviation of the spectrophotometric method was less than 2.7% and the recovery ranged from 96.3% to 103.8%. So the spectrophotometric method, which has some advantages such as expeditiousness, operation simplicity, analysis automatization and so on, could be used to measure COD in seawater.

关 键 词：分光光度法 化学耗氧量(COD) 海水 

分 类 号：O657.32[理学—分析化学] P734.2[理学—化学]