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本文研究了石墨炉原子吸收法测定锗的条件。试验了某些金属盐对测定锗的基体改进效应以及应用涂锆石墨管的效果。实验证明,应用涂锆石墨管可使测定锗的灵敏度提高约4.5～5倍,原子化出现温度从应用普通管时的2050K降低到1540K,消除了记忆效应。此时,锗的原子化机理可能是氧化锗被碳化锆还原,然后金属锗蒸发。提出了氯化锗用苯萃取后苯层进样的锗的分析方法。本研究可应用于煤灰中高于0.5ppm锗的测定。
In this paper, graphite furnace atomic absorption spectrometry for the determination of germanium conditions. The effects of some metal salts on the determination of germanium matrix and the application of graphite coated zirconium tube were tested. Experiments show that the application of graphite coated zirconium germanium can increase the sensitivity of the determination of about 4.5 to 5 times the atomization temperature from the application of ordinary 2050K down to 1540K, eliminating the memory effect. At this time, the atomization mechanism of germanium may be that germania is reduced by zirconium carbide, and then metal germanium is evaporated. The analytical method of germanium for benzene layer injection with benzene extracted by germanium chloride is proposed. This study can be applied to the determination of germanium above 0.5ppm in coal ash.