石墨炉原子化器中原子化过程的研究(Ⅴ)——高氯酸对锂和锗的干扰

高等学校化学学报 ›› 1988, Vol. 9 ›› Issue (12): 1222.

石墨炉原子化器中原子化过程的研究(Ⅴ)——高氯酸对锂和锗的干扰

郑衍生, 张大雷

吉林大学化学系

收稿日期:1987-05-13 出版日期:1988-12-24 发布日期:1988-12-24
通讯作者: 郑衍生

The Study of Atomization Process in Graphite Furnace Atomizer(Ⅴ)——Influence of Perchloric Acid on Absorption Signal of Lithium and Germanium in Graphite Furnace

Zheng Yansheng, Zhang Dalei

Department of Chemistry, Jilin University, Changchun

Received:1987-05-13 Online:1988-12-24 Published:1988-12-24

摘要/Abstract

摘要： 本文详细地研究了HClO₄对Li和Ge的干扰.HClO₄对Li原子吸收信号有明显的抑制作用,干扰的主要原因是气相中形成LiCl。当预加热温度达2000℃时,残留HClO₄干扰可消除。在HClO₄分解之前加入NH₄NO₃,可消除其干扰。HClO₄对Ge有增感作用,并与灰化温度有密切关系。500℃以前HClO₄增感效应随温度升高变化较小,高于500℃增感效应明显增加。

关键词: 石墨炉原子化器, 锂锗, 高氯酸干扰

Abstract: In this paper the influence of perchloric acid on absorption signal of lithium and germanium in graphite furnace was studied in detail. It was found that a suppression effect of perchloric acid on absorption signal of lithium wasShown.The suppression efiect is due to the formation of Lid originating from ther vapor phase reaction. The interference of .residual peichloric acid is eliminated at temperature of thermal pretreatment higher than 2000℃. The interference of perch-loric acid can be removed by adding NH₄NO₃ rrior to the decomposition of perchloric acid. The influence of perchloric acid on absorption signal of germaniumis closely related to ash temperature. The enhancement effect of perchloric acid is slowly increased with the raise of the temperature prior to 500℃, but obviously increases at temperatures higher than 500℃. The mechanism of interference is discussed as well.

Key words: Graphite futoace atomizer, Lithium, Germanium, Interference of perchloric acid

TrendMD:

郑衍生, 张大雷. 石墨炉原子化器中原子化过程的研究(Ⅴ)——高氯酸对锂和锗的干扰. 高等学校化学学报, 1988, 9(12): 1222.

Zheng Yansheng, Zhang Dalei . The Study of Atomization Process in Graphite Furnace Atomizer(Ⅴ)——Influence of Perchloric Acid on Absorption Signal of Lithium and Germanium in Graphite Furnace. Chem. J. Chinese Universities, 1988, 9(12): 1222.