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Citation: Zheng Yansheng, Zhang Dalei. STUOY OF ATOMIZATION PROCESS IN GRAPHITE FORNAOE ATOMIZER Ⅳ.EFFECT OF GRAPHITE FURNACE SUBSTRATE MATERIALS ON ATOMIZATION OF GERMANIUM[J]. Chinese Journal of Applied Chemistry, ;1987, 4(4): 21-25. shu

STUOY OF ATOMIZATION PROCESS IN GRAPHITE FORNAOE ATOMIZER Ⅳ.EFFECT OF GRAPHITE FURNACE SUBSTRATE MATERIALS ON ATOMIZATION OF GERMANIUM

Zheng Yansheng ^, ,
Zhang Dalei

1.
Department of Chemistry, Jilin University, Changchun

Corresponding author: Zheng Yansheng,
Received Date: 29 August 1986
Available Online: 8 October 1986

In this paper changes of shape of absorption signal, absorbance and dissipation of germaniutn in the standard graphite tube, zirconium-coated and tungsten-coated graphite tubes have been studied. It shows experimentally a larger enhancement of analytical sensitivity of germanium in the zirconium-coated and tungsten-coated graphite tubes was obtained. The appearance temperature of germanium appear is 1770K in the tungsten-coated graphite tube. The △H° value of germanium was 106.2 kcal/mol calculated according to equation:△H°=γTapp. It corresponds to the heat of evaporation of solid germanium (89.5kcal/mol). Therefore, the atom formation of germanium is the reduction of GeO₂ by carbide of tungsten following by the sublimation of germanium.
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