双道原子荧光光谱法同时测定污泥中的砷和汞  

Simultaneous Determination of Arsenic and Mercury in Sludge by Double Channel Atomic Fluorescence Spectrometry

作　　者：周大颖 龚小见[2] 麻晖 

机构地区：[1]贵州省化工产品质量监督检验站,贵阳市晒田坝路1号550002 [2]贵州师范大学天然药物质量控制研究中心,贵阳市宝山北路116号550001

出　　处：《光谱实验室》2012年第2期828-831,共4页Chinese Journal of Spectroscopy Laboratory

基　　金：贵阳市科技计划项目([2009]筑科工合同字第1-064号)

摘　　要：利用硝酸-高氯酸消解处理试样,建立了原子荧光光谱法同时测定污泥中砷和汞的方法。并对消解体系、负高压、灯电流、载气流量、屏蔽气流量、硼氢化钠浓度等作了研究并予以优化。方法的线性范围:砷0.0—60.0ng/mL、汞0.0—6.0ng/mL,相关系数r≥0.9998;砷和汞的检出限均为0.03ng/mL;砷、汞相对标准偏差均不大于2%,试样加标回收率砷91.0%—104.0%和汞90.0%—96.0%。该方法操作简便、快速、灵敏度高,完全适用于污泥试样的检测。The sample was dissolved with nitric acid-perchloric acid,and the method for the simultaneous determination of mercury and arsenic in sludge by double hannel atomic fluorescence spectroscopy was established.The digestion system,high voltage of PMT,lamp current,speed of carrying gas,shield gas flow and potassium borohydride concentration were investigated and optimized.The linearity ranges of method for arsenic and mercury were respectively 0.0—60.0ng/mL and 0.0—6.0 ng/mL with the correlation coefficients r great than or equal to 0.9998,and the detection limit of arsenic and mercury were all 0.03ng/mL with RSD less than or equal to 2%.The standard addition recoveries of the samples were in the rang of 91.0%—104.0% for arsenic and 90.0%—96.0% for mercury.This method is simple and rapid with high sensitivity,and that could be applied to simultaneously detecting arsenic and mercury in sludge.

关 键 词：原子荧光光谱法 污泥 砷 汞 

分 类 号：O657.31[理学—分析化学]