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目的探讨断续流动氢化物发生原子荧光测定饮用水中汞的方法,研究酸度、硼氢化钾浓度、灯电流、载气流速等对测定汞的影响。方法断续流动氢化物发生原子荧光光谱法。结果在优化的分析条件下,检测限为0.02 ng/mL,方法应用于水样中汞的测定,样品加标回收率在96.2%～102.0%之间,相对标准偏差为2.3%。结论方法具有操作简便、快速、灵敏度高等特点。
OBJECTIVE To investigate the method of atomic fluorescence spectrometry for the determination of mercury in drinking water by intermittent flow hydride generation and to study the influence of acidity, potassium borohydride concentration, lamp current and carrier gas flow rate on mercury determination. Methods Discontinuous flow hydride generation atomic fluorescence spectrometry. Results Under the optimal analytical conditions, the detection limit was 0.02 ng / mL. The method was applied to the determination of mercury in water samples with recoveries of 96.2% -102.0% and relative standard deviations of 2.3%. Conclusion The method is simple, fast, high sensitivity and so on.