废水中六价铬含量的常用测试方法研究  

Determination of the content of Cr (Ⅵ) in waste water

作　　者：袁文慧[1] 张丽平[1,2] 

机构地区：[1]北京服装学院材料科学与工程学院,北京100029 [2]服装材料开发与评价北京市重点实验室,北京100029

出　　处：《毛纺科技》2011年第6期56-58,共3页Wool Textile Journal

基　　金：北京市教委科研项目(项目编号:KYJH02100203);服装材料开发与评价北京市重点实验室(项目编号:2007ZK-06)

摘　　要：采用等离子发射光谱法(ICP)、分光光度法等不同方法测定了不同溶液中的Cr6+含量,并通过相对误差和加标回收率2种标准对比了各种方法的测试精度。结果表明:ICP测试简单、准确,但成本高,适用于测试结果要求高,特别是微量及痕量测试时使用;分光光度法测试精度较高,可作为快速测试方法使用,其中DPC法在铬含量0.5～2.0 mg/L时较准确,过氧化钠和EDTA法在铬含量10 mg/L左右误差较小;测试废液中的铬含量时可采用分光光度法进行初步测试,而后再根据浓度范围选择适宜的方法直接进行测试,或稀释后测试。In this paper,the content of Cr（Ⅵ） in different solutions was determined by inductive coupled plasma emission spectrometer（ICP） and spectrophotometry.Testing accuracy of these methods was compared by relative error and adding standard recovery.The results showed that： ICP test was simple,accurate,but cost was high,it can used for high results requirements,particularly the use of micro and trace test.High precision spectrophotometric method can be used as a rapid test method.DPC method was more accurate when the chromium content was 0.5~2.0 mg/L.When the chromium content was about 10mg/L,the relative error was low by sodium peroxide and EDTA method.When testing the chromium content in waste water,according to the approximate concentration confirmed preliminary by spectrophotometry,the appropriate test method was used to obtain the exact concentration in the primary liquid or dilution.

关 键 词：六价铬 测试 等离子发射光谱法 分光光度法 

分 类 号：X832[环境科学与工程—环境工程]