流动注射-氢化物发生原子吸收光谱法测定飞灰、炉渣中的汞和砷

Determination of Mercury and Arsenic in Flying Ash,Slag by Flow Injection-Hydride Generation AAS

采用流动注射-氢化物发生原子吸收光谱法测定飞灰、炉渣中的汞和砷。在酸性介质中,用硼氢化钾作还原剂,通过载气导入电热石英吸收管,在波长253.7nm和193.7nm处分别对汞、砷进行测定。结果表明,该方法对汞和砷的检出限分别为0.27ng/mL,0.16ng/mL,回收率分别为97.8%、96.7%。该法操作简便、快速、灵敏度高,对实际样品的测定结果令人满意。

The amounts of mercury and arsenic in flying ash and slag were determined by flow injection-hydride generation atomic absorption spectrometry. In acidic medium, using KBH4 as reducing agent, the vapor was carried into electrically heated quartz absorption tube, mercury and arsenic were detected at 253.7nm and 193.7nm,respectively. Limits of detection were 0. 27ng/mL and 0. 16ng/mL,and the recoveries were 97.8% and 96.7% for mercury and arsenic,respectively.