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目的用氢化物发生原子荧光光谱法分析水中的砷和汞。方法详细研究了灯电流、载气流速、原子化器高度、盐酸浓度和硼氢化钾浓度等因素对检测的影响。结果在仪器最佳工作条件下,砷和汞分别在0～10.00μg/L和0～2.00μg/L的浓度范围时呈现良好的线性关系,相关系数为0.9994和0.9986;砷和汞的检出限分别为砷0.028μg/L汞0.0044μg/L;相对标准偏差分别小于0.8%和0.6%;砷和汞的加标回收率分别在98%～104%和99%～110%之间。结论本方法具有操作简单、快速、基体干扰少、灵敏度高和重现性好的优点,能用于同时测定水中的砷和汞。
Aim To analyze arsenic and mercury in water by hydride generation atomic fluorescence spectrometry. The effects of lamp current, carrier gas flow rate, atomizer height, hydrochloric acid concentration and potassium borohydride concentration on the detection were studied in detail. Results Arsenic and mercury show a good linear relationship in the range of 0 ~ 10.00μg / L and 0 ~ 2.00μg / L, respectively, with correlation coefficients of 0.9994 and 0.9986 under the optimal working conditions of the instrument. The detection of arsenic and mercury The limits of determination were arsenic 0.028μg / L and mercury 0.0044μg / L, respectively. The relative standard deviations were less than 0.8% and 0.6%, respectively. The recoveries of arsenic and mercury were 98% -104% and 99% -110%, respectively. Conclusion The method has the advantages of simple operation, fast, less matrix interference, high sensitivity and good reproducibility. It can be used for the simultaneous determination of arsenic and mercury in water.