流动注射在线萃取-汞蒸气还原原子荧光光谱法测定土壤中痕量汞  

Determination of trace mercury in soil by atomic fluorescence spectrometry combined with mercury vapour reduction and flow injection on-line extraction technique

作　　者：刘汉东[1] 邱海欧[2] 程沧沧[1] 吴少尉[2] 陈恒初[1] 汤志勇[2] 金泽祥[2] 

机构地区：[1]江汉大学化学与环境工程学院,湖北武汉430019 [2]中国地质大学材料科学与化学工程学院,湖北武汉430074

出　　处：《冶金分析》2002年第4期10-12,9,共4页Metallurgical Analysis

基　　金：地质矿产 95科技资助项目 (95 0 5 60 1-2 )

摘　　要：提出了流动注射在线萃取非水介质汞蒸气还原 -原子荧光光谱法测定土壤样品中痕量汞的新方法。将汞萃取到[KI +HNO3+ (NH2 ) 2 CS] /TBP有机相中 ,NaBH4 溶于N ,N 二甲基甲酰胺 (DMF)中 ,将非水介质中汞还原产生的汞蒸气导入石英炉中 ,进行原子荧光测定。方法的检出限 (K =3 )为 0 0 5ng/mL ,RSD为 5 2 %。应用本法测定土壤标准样品中痕量汞 。A new method of determining trace mercury in soil by atomic fluorescence spectrometry combined with mercury vapour reduction and flow injection on line extraction technique had been developed mercury was extracted into organic phase[KI+HNO 3+(NH 2) 2CS]/TBP,mercury in the non aqueous medium was reduced by NaBH 4[dissolved in N,N dimethyl formamide(DMF)] into gaseous meroury, which was determined by atomic fluorescence spectrometry in quartz stove The detection limit(K=3)was 0 05ng/mL The RSD was 5 2% The results for determining trace mercury in standard soil sample were satisfactoty

关 键 词：土壤中 痕量汞 流动注射 在线萃取 汞蒸气 原子荧光光谱法 

分 类 号：O657.3[理学—分析化学]