氢化物发生-原子荧光法测定中草药中的痕量铋

Determination of Trace Bismuth in Traditional Chinese Medicines by Hydride Generation Atomic Fluorescence Spectrometry

研究了氢化物发生-原子荧光法测定中草药中痕量铋的适宜条件, 试验了不同的消解方式、酸介质和还原剂的用量对测定铋的影响. 在最佳测定条件下, 铋的线性范围为0.1～200 μg·L-1, 检出限为0.094 6 μg·L-1. 仪器的相对标准偏差为0.55%, 加标回收率为94%～107%. 结果表明本法具有快速、简便和准确等特点.

A method is reported for the determination of trace bismuth in traditional chinese medicine by hydride generation atomic fluorescence spectrometry. The effect of different means of digestion, the medium amounts of acid and reducing agent on the determination of Bi is investigated. In the given conditions, the linear range of determination is 0.1-200 μg· L^-1 , and the detection limit is 0.094 6μg·L^-1. The instrumental relative standard deviation is about 0.55% and the recovery is about 94%-107%. The method is accurate, rapid and convenient with satisfactory results.