NaOH-Na2CO3混合消解测定铬渣中六价铬  

Determination of Hexavalent Chromium in Chromium Residue Using the NaOH-Na2CO3 Mixed Digestion System

作　　者：魏松[1,2] 李瑾[1,2] 肖亚琼[1,2] 

机构地区：[1]湖南省环境保护科学研究院,湖南长沙410004 [2]水污染控制技术湖南省重点实验室,湖南长沙410004

出　　处：《环境科学与管理》2011年第5期152-153,161,共3页Environmental Science and Management

摘　　要：采用NaOH-Na2CO3、MgCl2和H3PO4缓冲溶液混合消解体系对铬渣进行处理,建立了铬渣中六价铬的测定方法。结果表明,此方法在0 mg/L^0.200 mg/L范围内线性良好,检出限为0.15 mg/kg（以0.5 g样品计）,铬渣样品的RSD为5.5%,加标回收率为91.7%~106.3%。方法操作较为简便,精密度与准确度均符合要求。By proceeding chromium residue using the NaOH-Na2CO3,MgCl2 and H3PO4 buffer solution mixed digestion system;we established the determination of hexavalent chromium in chromium residue.Results showed that this method suggested a good linear relationship in the range of 0 mg/L^0.200 mg/L,detection limit is 0.15 mg/kg（taking 0.5g samples into account）.The sample RSD was 5.5% and the recovery rate is 91.7%~106.3%.This method is relatively simple,with its precision and accuracy fulfilled the requirements.

关 键 词：铬渣 六价铬测定 混合消解体系 

分 类 号：X830.2[环境科学与工程—环境工程]