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周期系中某些元素如Ge、Sn、Pb、As、Sb、Bi、Se、Te等,在通常雾化火焰原子吸收测定中灵敏度很低,不能满足微量测定要求。近年发展起来的用气相氢化物原子化测定这些元素的方法,经不断改进,灵敏度有些已达到ppb级。由于它在环境监测及材料检验等各种分析中发挥了重要作用,该法几乎已成为原子吸收分光光度法的一个小分支而发展着,这里,我们仅就它的原理,应用及评价予以讨论。一、方法的化学原理
Periodic system of some elements such as Ge, Sn, Pb, As, Sb, Bi, Se, Te and other atomization flame atomic absorption spectrometry in the general low sensitivity, can not meet the trace determination requirements. Developed in recent years with gas hydride atomization of these elements of the method, after continuous improvement, some sensitivity has reached ppb level. Because it has played an important role in various analyzes such as environmental monitoring and material inspection, the method has been developed almost as a small branch of atomic absorption spectrophotometry. Here, we discuss only its principles, applications and evaluations . First, the method of chemical principles