摘要
在氢化物 -原子荧光光谱分析 (HG- AFS)双道测定铋汞时 ,铋原子在高温热能和汞光源辐射能的共同作用下 ,部分电子受激跃迁产生弱荧光谱线 (如 Bi2 5 3.6 6 nm ) ,这些谱线与汞产生的共振波长 (Hg2 5 3.6 5 nm)相互重叠 ,对汞的测定产生干扰。该干扰具有一定的规律性 ,可以通过数学计算的方式予以消除。文章对干扰的产生 ,影响因素 ,生成机理进行了研究 ,提出了消除干扰的数学模式 ,并将其应用于 1∶ 2 0× 10 4化探样品分析中 。
When Bismuth and Mercury were simultaneously determined by double channel hydride generation atomic fluorescence spectrometry (HG AFS),transition of share electron of Bismuth atom occurs due to excitation and generates weak fluorescence spectrum line(i.e.Bi \{253.66\} nm) under the conditions of high temperature,heat energy and radiant energy of excited lamphouse of Mercury.These spectrum lines superpose with the resonance vibration wavelength (Hg 253.65 nm) of Mercury produced by Bismuth.The interference is of certain rule and can be eliminated by mathematic calculation.In this paper,the phenomenon,effective factors and the mechanism of the interference have been studied.A mathematic model of eliminating interference has been proposed and used for the determination of 1∶200,000 geochemical prospecting samples.The results have been proved to be satisfactory.
出处
《矿物岩石》
CAS
CSCD
北大核心
2000年第3期102-104,共3页
Mineralogy and Petrology
关键词
氢化物原子荧光
铋
汞
光谱干扰
数学模式
hydride generation atomic fluorescence
Bismuth Mercury
spectrum interference
mathematical model
elimination
