石墨炉原子化器中原子化过程的研究(Ⅲ)——石墨炉中锗的原子化机理

高等学校化学学报 ›› 1988, Vol. 9 ›› Issue (2): 192.

石墨炉原子化器中原子化过程的研究(Ⅲ)——石墨炉中锗的原子化机理

郑衍生, 张大雷

吉林大学化学系

收稿日期:1986-08-29 出版日期:1988-02-24 发布日期:1988-02-24

Studies on Atomization Process in Graphite Furnace Atomizer (Ⅲ)--Atomization Mechanism of Germanium in Graphite Furnace

Zheng Yansheng, Zhang Dalei

Department of Chemistry, Jilin University, Changchun

Received:1986-08-29 Online:1988-02-24 Published:1988-02-24

摘要/Abstract

摘要： 有关锗的石墨炉原子吸收光谱分析,文献报道较少,对锗的原子化机理,亦有不同的看法^[1~3].本文基于右墨炉中锗原孚化行为的观察,对锗原子形成的过程进行了讨论,认为原子化过程中,并存着二种还原反应:GeO₂(s)+C→GeO(g)+CO(g),GeO₂(s)+CO→GeO(g)+CO₂,而锗原子的形成是GeO(g)热分解的结果。

Abstract: The atomization mechanism of germanium is discussed on the basis of observation of atomization behavior of germanium and enhancement effects of HNO₃, HClO₄ and organic compounds on absorption signal of Ge in graphite furnace. It is affirmed that two types of reduction reaction in atomization process are existed.GeO₂(s)+C→GeO(g)+CO and GeO₂(s)+CO→GeO(g) +CO₂ .The appearancetemperature of Ge experimentally was measured to be 2150K.The △H° value of Ge is 138.5 kcal/mol calculated by using △H° =γT_app.It is corresponding to the dissociation energy of the Ge-Obond(l58.8 kcal/mol). The germanium atoms in vapor phase are formed which is due to the thermal decomposition of GeO(g).

TrendMD:

郑衍生, 张大雷. 石墨炉原子化器中原子化过程的研究(Ⅲ)——石墨炉中锗的原子化机理. 高等学校化学学报, 1988, 9(2): 192.

Zheng Yansheng, Zhang Dalei . Studies on Atomization Process in Graphite Furnace Atomizer (Ⅲ)--Atomization Mechanism of Germanium in Graphite Furnace. Chem. J. Chinese Universities, 1988, 9(2): 192.