分光光度法测定造纸厂废水COD_(Cr)  

COD_(Cr) Detection of the Wastewater from Paper Mill by Spectrophotometry

作　　者：邹良明[1] 

机构地区：[1]四川工商职业技术学院,四川都江堰611837

出　　处：《纸和造纸》2014年第3期64-65,共2页Paper and Paper Making

摘　　要：利用分光光度计330 nm处测定造纸厂废水与重铬酸钾反应前后Cr6+的吸光度值,间接找到废水消耗重铬酸钾的量,其消耗量与废水CODCr值成正比,由此可以得出废水COD Cr值。与国家标准CODCr测定方法比较结果基本相同,相对误差小于2%。Fisrt, the absorbance value of Cr6＋was measured at the point of 330 nm before and after the reaction between the wastewater from paper mill and potassium dichromate. Then the consumption of potassium dichromate reacted with wastewater could be found indirectly through this process and its consumption is proportional to the CODcr value, which could help to calculate the value of CODcr. Compared with the national standard method, the data measured by spectrophotometry is roughly the same as the standard one, the relative error is less than 2%.

关 键 词：CODCR 直接测定 分光光度法 

分 类 号：O657.3[理学—分析化学] X793[理学—化学]