摘要
建立了碱性条件下双氧水氧化测定废水中总铬的方法。考察了前处理条件对测量体系的影响。在优化实验条件下,该方法检出限为0.003 mg/L;以2个样品为例,每个浓度进行6次平行测定,并对样品做消解前加标,铬的回收率为104%~114%之间,RSD≤5%。对两种不同的消解方法进行比对,结果证明：双氧水氧化法对测定废水中的总铬较好。
This paper established a method for determining chromium in wastewater,which is oxidized by hydrogen peroxide under alkaline environment. Working conditions of pretreatment have been investigated in detail. Under the optimal conditions,the detected limit is 0. 003 mg / L. The average recoveries are 104% ~ 114% and the relative standard deviation（ RSD） is no more than 5% for two kinds of wastewater samples. As the results of comparison between two kinds of pretreatment shows,pretreatment using hydrogen peroxide is preferable to using potassium hypermanganate.
出处
《环境科学与管理》
CAS
2015年第11期127-129,共3页
Environmental Science and Management
基金
江苏省环境监测科研基金项目(1310)
关键词
前处理
双氧水氧化
总铬
废水
pretreatment
oxidation with hydrogen peroxide
chromium
wastewater
