Determination of Germanium in Geological Samples by Graphite Furnace AAS Using Mixed Matrix Modifier
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Optimum conditions for the determination of Ge by graphite furnace AAS were studied. The effects of some metal salts on the determination of Ge were tested, the bulk of sulphate ions derived from the sample was eliminated by means of barium chloride. GeCl4, was extracted with benzene and back extracted with water. Sensitivity for Ge was increased by about 100 times using Ni-(NH4)2 -C2O4-NH40H as mixed matrix modifier. The absolute sensitivity of Ge was 8.8 x 10-12g. The RSD for sample conta- ining 0.94ppm of Ge was 3.9%(n=11).
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张金叶,刘献蔚,宋金明, 1985. 用混合基体改进剂石墨炉AAS测定矿石中的锗[J]. 岩石矿物学杂志, 4(4):350~354. , 1985. Determination of Germanium in Geological Samples by Graphite Furnace AAS Using Mixed Matrix Modifier[J]. Acta Petrologica et Mineralogica, 4(4): 350~354.