连续流动—氢化物发生—原子荧光法测定水中总汞

来源期刊：黄金2010年第8期

论文作者：樊智虹

文章页码：47 - 50

关键词：连续流动； 氢化物发生； 原子荧光法； 汞； 水

Key words：continuous flow； hydride generation； atomic fluorescence spectrometric method； mercury； water

摘    要：介绍了连续流动—氢化物发生—原子荧光测定水中总汞的方法,研究了硼氢化钾质量分数、灯电流、光电倍增管负高压、泵速、载气和屏蔽气流量等对测定总汞的影响,找出了测定水中总汞的最佳条件。在最佳条件下,方法检出限为0.003 1μg/L,加标回收率在91.6%～108%之间,测定结果令人满意。该方法具有操作简便、快速,基体干扰少,灵敏度高等优点。

Abstract: In this paper,a method of continuous flow-hydride generation-atomic fluorescence spectrometric to determine the total mercury in water is introduced.Factors that influence the determination of mercury,such as the concentration of potassium borohydride,the lamp current,the negative high-pressure of photomultiplier tube,the pumping speed,the carrier gas and shielding gas flow rate,are researched to find the optimal conditions for the determination of mercury in water.The minimum detection limit of this method is 0.003 1 μg/L under the best conditions.The recovery rate of standard material is in the rang of 91.6 %-108 %.The results obtained are satisfactory.This method has the advantages of simple operation,high speed,high sensitivity and with little interference by base.