摘要
高浓度的氯离子对废水COD的测定结果具有严重的干扰。采用稀释法、硝酸银沉淀法、硫酸汞络合法、密封消解法,对高氯低COD水样的COD测定方法进行了实验研究,从方法的原理、测定结果及适用范围等方面,比较了上述4种测定方法的优缺点。结果表明,在测定高氯低COD废水COD时,密封消解法是一种准确度高、快速简便且适用范围广的方法。
The high concentration of chloride ion causes serious interference to the determination of COD in wastewater. Analysis of COD in low COD wastewater with high chlorine was studied. Methods of dilution, silver nitrate precipitation, mercury sulfate complexation and sealed digestion were evaluated and compared. The results showed that the sealed digestion method was more accurate, simple and widely applied in the determination of COD in low COD wastewater with high chlorine.
出处
《精细化工中间体》
CAS
2014年第1期61-63,66,共4页
Fine Chemical Intermediates
关键词
废水
高氯
COD
wastewater
high chlorine
COD
