电感耦合等离子体原子发射光谱（ICP-AES）法测定固体废物浸出液与消解液中六价铬  

Determination of Cr（Ⅵ）in Solid Waste Leachate and Digester by Inductively Coupled Plasma Atomic Emission Spectrometry

作　　者：王玉功[1] 刘婧晶 余志峰[1] WANG Yugong;LIU Jingjing;YU Zhifeng(Lanzhou Testing and Quality Supervision Center for Geological and Mineral Products,The Ministry of Land and Resources,Lanzhou,Gansu 730050,China)

机构地区：[1]国土资源部兰州矿产资源监督检测中心

出　　处：《中国无机分析化学》2019年第5期1-4,共4页Chinese Journal of Inorganic Analytical Chemistry

基　　金：甘肃矿产资源勘查与综合利用工程技术研究项目（甘财教[2013]135）

摘　　要：建立了电感耦合等离子体原子发射光谱(ICP-AES)法测定固体废物中Cr(Ⅵ)的测定方法。将硝酸硫酸法"HJ/T299-2007"浸提的浸出液,用聚氯化铝絮凝剂将Cr(Ⅲ)沉淀除去,采用电感耦合等离子体原子发射光谱法测定Cr(Ⅵ)。同时,将碱消解/原子吸收光谱法"HJ687-2014"测定Cr(Ⅵ)总量也采用ICP-AES法测定。研究了聚氯化铝的用量、仪器工作条件、共存离子的干扰等因素。结果表明,ICP-AES法的检出限低、线性范围宽、线性相关系数为0.9996,方法的相对标准偏差为0.58%~3.8%,加标回收率为90%~114%,避免了溶液基体颜色的干扰,适合皮革固体废物浸出液和碱消解液中Cr(Ⅵ)含量的测定。In this paper,a method for the determination of Cr(VI) in solid waste by inductively coupled plasma atomic emission spectrometry was established.The leaching solution extracted by nitric acid-sulfuric acid method "HJ/T 299-2007" was precipitated with polyaluminium chloride flocculant to remove Cr(III).The content of Cr(VI) was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES).At the same time,the total amount of Cr(VI) determined by HJ 687-2014 alkali digestion and atomic absorption method was also determined by inductively coupled plasma atomic emission spectrometry.The factors such as the amount of polyaluminum chloride,the working conditions of the instrument,and the interference of coexisting ions were studied.The results showed that ICP-AES method has low detection limit,wide linear range,the linear correlation coefficient is 0.999 6,the precision of the method is 0.58%-3.8%,and the recovery rate is 90%-114%,which avoids the interference of the color of solution matrix.It is suitable for the determination of Cr(VI) content in leather solid waste leachate and alkali digestion solution.

关 键 词：电感耦合等离子体原子发射光谱法 固体废物 六价铬 

分 类 号：O657.31[理学—分析化学] TH744.11[理学—化学]