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

Abstract: 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.

Key words: High-pressure and airproof microwave digestion, Sequential injection-Hydride generation-atomic fluorescence spectrometry, Copper concentrate, Arsenic content, Mercury content