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孙素芬同志:伏尔科夫法测定铀的几个问题的解答之二——四价铀磷酸盐的沉淀四价铀的磷酸盐沉淀,必须在盐酸或过氯酸介质中进行,共酸度范围相当大,以体积计算为1-3％。在溶液的酸度小至0.5-0.8时,磷酸盐沉淀不会定量进行。可见,溶液的酸度大小是影响整个分析过程中质量好坏的主要关键之一。关于这个问题分为下面几方面探讨。1.还原剂(二硫四氧酸钠)的用量
Comrade Sun Sufen: Volkswagen uranium determination of several solutions to the second of two - tetravalent uranium phosphate precipitation Tetravalent uranium phosphate precipitation, hydrochloric acid or perchloric acid medium must be carried out in a total acidity range Very large, 1-3% by volume. Phosphate precipitation did not proceed quantitatively when the acidity of the solution was as small as 0.5-0.8. Visible, the acidity of the solution size is one of the key factors affecting the quality of the entire analysis process. On this issue is divided into the following aspects to explore. 1. Reducing agent (sodium dithionate) dosage