【摘要】 <正> 国产的冷原子荧光测汞仪大都选择氮气作载气,检测极限为0.5μg。这不能满足直接测定海水中痕量汞的要求,为提高共灵敏度,我们在用国产YYG-2型冷原子荧光测汞仪直接测定海水中汞时,对载气的选择和不同基液配制的标准溶液的存放时间作了初步探讨。更多还原

【Abstract】 This paper discussed the effect of different carrier gases on cold vapour atomic fluorescence for direct determination of mercury concentration in seawater. It was found that the enhancement of the fluorescence signal obtained with argon as the carrier gas instead of highly pure nitrogen is approximately a factor of 4.The standard solutions prepared with 1% sodium chloride mixed acid solution was more stable than that prepared with mixed acid.The concentrations of inorganic and total mercury in seawater samples taken from Jiaozhou Bay are 0.0017μg/L and 0.0037μg/L respectively.更多还原