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本文着重对硅钼杂多酸定量生成时酸、钼、硅三者的相互制约和依存关系作了初步探讨,以便掌握发色条件之变化规律。同时将其推向中等含量和高含量的测定,使之适用于多种矿石(包括含SiO_2在90%以上的矽石)中SiO_2的测定. 一分析母液的制备在酸性溶液中高浓度的硅酸易聚合,影响其与钼酸的反应,试验证明20%以下的SiO_2可直接用100毫升2N的盐酸浸取。高含量的宜用热水浸泡,缓慢反酸化于100毫升2N盐酸溶液中,然后煮沸30秒.此法制备之溶液可稳定6天。二硅钼杂多酸的形成条件 (1) 钼、硅关系固定硅量、酸量,对钼的用量进行探讨,见图
This article focuses on the quantitative analysis of acid-molybdenum, silicon and molybdenum heteropolyacid during the formation of the mutual restraint and dependence of the three were discussed in order to master the changing law of chromogenic conditions. At the same time it will be pushed to the determination of medium content and high content, making it suitable for a variety of ores (including SiO_2 containing more than 90% of the silica) Determination of SiO_2 An analysis of the mother liquor Preparation Acid solution in high concentrations of silicic acid Easy to polymerization, affecting its reaction with molybdic acid, the test proved that 20% of the following SiO 2 can be directly with 100 ml of 2N hydrochloric acid leaching. High content should be soaked with hot water, slowly back acidified in 100 ml of 2N hydrochloric acid solution, and then boiled for 30 seconds.The solution prepared by this method can be stable for 6 days. Di-silico-molybdenum heteropoly acid formation conditions (1) Molybdenum, silicon relationship Fixed silicon volume, acid volume, the amount of molybdenum to be explored, see Figure