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方法基于测定在光谱中的一对锗线和锗线的相对黑度,用交流电弧作光源,使易挥发的硫化锗从硫化铁中分馏出来。被分析的矿石在分析前与硫、石英和内标元素组成的缓冲剂混合,用无锗的铁矿及光谱纯二氧化锗作标准,分析范围0.00055～0.1％,百分均方误差为±11.5％。 1.标准试样的制备取不含Ge及Sb的矿样作为空矿,加入一定量光谱纯GeO_2,配制一个0.1％的标准后逐渐用空矿稀释得0.1％,0.01％,0.0033％,0.0011％,0.00055％五个标样。空矿成分: SiO_2—36.44％ Al+Ti—10.09％ Fe_2O_3=30％ CaO—0.56％ MgO-0.74％ Pb-0.01％
The method is based on the determination of the relative blackness of a pair of germanium lines and germanium lines in the spectrum by using an alternating current arc as a light source to fractionate the volatile germanium sulfide from the iron sulfide. The ore analyzed was mixed with the buffer composed of sulfur, quartz and internal standard elements before analysis. The analysis range was 0.00055 ~ 0.1% with germanium-free iron ores and pure germanium dioxide. The mean square error was ± 11.5%. 1. Preparation of standard sample Take Ge and Sb-free ore samples as an empty ore, adding a certain amount of pure GeO_2 spectrophotometry, 0.1% of the standard preparation of a gradually empty ore was diluted to 0.1%, 0.01%, 0.0033%, 0.0011 %, 0.00055% five standard samples. Empty ore composition: SiO_2-36.44% Al + Ti-10.09% Fe_2O_3 = 30% CaO-0.56% MgO-0.74% Pb-0.01%