Abstract: 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.