计算法测定硅酸盐岩石中二氧化硅含量

To Measure the Content of SiO2 in the Silicate by Calculation

摘要: 硅酸盐岩石全分析通常是指SiO2、Al2O3、Fe2O3、MgO、CaO、MnO、TiO2、Na2O、K2O、P2O5、BaO、H2O+、CO2等共计13项组分的测定。超基性岩石还需要增加Cr2O3、NiO、CoO的测定。分析结果的总和应接近100%。以100%减掉上述组分和量计算得到SiO2含量。应用本方法测定有证国家一级标准样品和参加能力验证其结果与国家标准方法所测结果一致，均在误差允许范围之内。在本法较国家标准方法分析周期短，操作简便，适合测定中性岩以及酸性岩中SiO2含量。

Abstract: Silicate rock whole analysis usually refers to the determination of SiO2, Al2O3, Fe2O3, MgO, CaO, MnO, TiO2, Na2O, K2O, P2O5, BaO, H2O+, CO2 and a total of 13 components. Ultrabasic rocks also need the determination of Cr2O3, NiO and CoO. The sum of the analysis results should be close to 100%, to get SiO2 content by subtracting 100% of the components calculated above. The determination results of participate ability for the national certified standard sample in this method are consistent with the measured results in national standard method, and both the results are within tolerance limits. Compared with the national standard method, this method has a much shorter analysis cycle, is easy to operate, and is suitable for the SiO2 content determination of neutral and acidic rocks.