摘要
对于高氯离子浓度,低COD值的水样,用国标法测定COD值时会产生较大误差,且误差随着Cl-浓度的增加而增大。通过实验探讨了高氯离子浓度对水样COD测定的影响及消除影响的方法。结果表明,采取不掩蔽Cl-测定水样的COD总量,减去氯离子自身产生的COD值,能较准确地反映水样的COD值且结果重复性好。
Errors will appear when COD value is determined by GB1191489 for high Cl- concentration water sample. In this paper the effect and eliminating effect method of high Cl- concentration to COD determination was investigated through experiment The result show that determining the COD amount of water sample without sequestrating Cl-, and then minus the COD value produced by Cl- itself, with that amount can not only accurately inflect water sample COD value, but also have good repeatability
出处
《中国环境监测》
CAS
CSCD
北大核心
2003年第2期44-45,53,共3页
Environmental Monitoring in China
关键词
高氯离子浓度
COD
掩蔽
high Cl^- concentration
COD
sequestrate
