顺序注射氢化物发生-原子荧光光谱法同时测定中草药中铋和汞

建立了一种顺序注射氢化物发生-原子荧光光谱法测定中草药中的Bi和Hg的方法,讨论了共存离子的干扰情况。在最佳实验条件下,Bi和Hg的检出限分别为0.0057μg/L和0.0197μg/L,加标回收率为93.4%~104.7%,相对标准偏差小于4.3%,被测中草药试样中共存的离子对Bi和Hg的测定没有干扰。方法可用于中草药试样中Bi和Hg的同时测定。

Study on simultaneous determination of Bi and Hg in chinese herbal medicine by the sequential injection hydride generation atomic fluorescence spectrometry

A method for the determination of Bi and Hg in Chinese herbal medicine by sequential injection hydride generation atomic fluorescence spectrometry was established. The interference circumstance of the coexistence ions at the same time was discussed. Under the proposed conditions, the detection limits of the Bi and Hg were 0.0057 and 0.0197 μg/L. Recoveries of standard addition of the Bi and Hg have been proveed to be 93.4% ～104.7% in samples . The maximum RSD was 4.3%. The coexistence ions in chinese herbal medicine samples hardly interfered in the determination of bismuth and mercury. The operation was easy and its sensitivity was high. This method is feasible and practicable to determine bismuth and mercury in chinese herbal medicine.