一种检测铜精矿中砷和汞含量的新方法——高压密封微波消解—顺序注射—氢化物发生—原子荧光光谱法  

A New Method for Determination of Arsenic and Mercury in Copper Concentrates: By High-pressure-airproof Microwave Digestion,Sequential Injection, Hydride Generation,and Atomic Fluorescence Spectrometry

作　　者：苏明跃[1] 杨丽飞[1] 郭芬[1] 

机构地区：[1]天津出入境检验检疫局

出　　处：《金属矿山》2011年第4期83-88,93,共7页Metal Mine

摘　　要：利用高压密封微波消解和顺序注射—氢化物发生—原子荧光光谱两项技术建立了检测铜精矿中砷、汞含量的新方法,并通过试验确定了适宜的检测条件。研究结果表明:本方法对砷的检出限为0.02μg/L,对汞的检出限为0.05μg/L;检测铜精矿中砷、汞的含量时,砷、汞的回收率分别为94.3%～107.0%和91.0%～102.0%,检测结果相对标准偏差分别在0.93%～1.97%之间和3.11%～8.07%之间,并且检测结果与认定值和国家标准方法测定值一致。A new method for the determinations of arsenic content and mercury content in copper concentrates was founded by adopting two processes of high pressure-airproof microwave digestion and the sequential injection-hydride generation-atomic fluorescence spectrometry.Through tests,the optimum conditions for detection were determined.The tests results indicated that the detection limit of arsenic was 0.02 μg/L and the detection limit of mercury was 0.05 μg/L by this method.While detecting arsenic and mercury content in copper concentrate,it is found that the arsenic and mercury recovery rates reached 94.3%~107.0% and 91.0%~102.0% respectively with relative standard of deviation between 0.93%~1.97% for arsenic and 3.11%~ 8.07% for mercury.Also,these detecting results are in good agreement with the certified values and the values by the national standard method.

关 键 词：高压密封微波消解 顺序注射—氢化物发生—原子荧光光谱法 铜精矿 砷含量 汞含量 

分 类 号：O657.31[理学—分析化学]