原子荧光氢化法在地质样品中的应用

Application of Non-dispersive Atomic Fluorescence and Hydride-generating Technique to Determination of Samples

原子荧光光谱法是七十年代后在电子技术不断发展的情况下才获得日益重视,目前已广泛应用于冶金、环保、医疗、石油、岩矿、高纯物质等分析领域。为了适应地质样品分析工作的需要,辽宁、陕西、甘肃三省地质局实验室共同协作,终于在一九八○年研制成功AFS—1型原子荧光光谱分析仪及HG—1型氢化物发生器,应用于地层样品的分析上,其检出限均能达到化探扫面的要求,并具有较高的分析范围。

The method is based on an electrodeless discharge lamp excited by microwaves to serve as a light source and is applicable to non-dispersive atomic fluorescence.The KBH4 solution is used as a reducing agent to generate hydrides of As,Bi,Sb and metallic vapour of Hg from samples.These hydrides are introduced into a heated quartz tube by a small amount of argon,to which a hydride generator is attached in order to maintain the combustion and atomization of hydrides.The sensitivity of the determination is as follows,As 8.5×10^(-10) g,Sb 4×10^(-10)g,Bi 1.9×10^(-10)g and Hg 2.6×10^(-10)g.