Chem. J. Chinese Universities ›› 1988, Vol. 9 ›› Issue (12): 1222.

• Articles • Previous Articles     Next Articles

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   

  1. Department of Chemistry, Jilin University, Changchun
  • Received:1987-05-13 Online:1988-12-24 Published:1988-12-24

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: