Abstract: With organic germanium and total germanium as indexes in herbal medicine,and with the property of GeCl₄ low boiling point,the organic germanium and inorganic germanium are separated and extracted by fully automated sample digestion system,and determined by atomic fluorescence spectrometry.We found that inorganic germanium could be extracted at 50 ℃,vibrating for 40 min in mass fraction of 1% HNO₃.In 6 mol/L HCl heated at 100 ℃ for 60 min,the inorganic germanium and organic germanium can be separated.The LOD of Ge was 0.16 μg/L,the recoveries of germanium was 92.5%～104.0%,and the RSD was 2.01%～3.77%,which accords with the demand of analysis.

Key words: medicinal material, fully-automatic graphite digestion instrument, digestion, separation, atomic flourence spectrometry, organic germanium, total germanium