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在用制酸尾气二氧化硫制石膏工艺中,要求分析硫酸铝溶液中的锰。如果不经分离直接原子吸收光谱法测定锰,其结果偏低,若经分离后用原子吸收光谱法测定锰,则很烦琐。有文献报导,在硫酸,磷酸介质中,用高锰酸盐比色法测定锰。上述方法都不理想。 在测定硫酸铝溶液中的锰时,在介质选择上,我们做了很大改进。不需要在硫酸和磷酸混合酸介质中,仅在磷酸介质中即可。有磷酸存在,使一种中间状态的水溶性三价锰的磷酸络合物稳定。它容易用高碘酸钾氧化成七价锰,可以消除可溶性二氧化锰的形成。这样在分析流程中不加入硫酸,简化了分析手续,避免腐蚀衣服,
In sulfuric acid tail gas sulfur dioxide gypsum process, the analysis of manganese in the aluminum sulfate solution. If the separation without direct atomic absorption spectrometry manganese, the result is low, if after separation by atomic absorption spectrometry manganese, it is cumbersome. It has been reported in the literature, in sulfuric acid, phosphoric acid medium, potassium permanganate colorimetric determination of manganese. None of the above methods are ideal. In the determination of manganese sulfate solution, in the media selection, we made a lot of improvement. Do not need sulfuric acid and phosphoric acid mixed acid medium, only in the phosphoric acid medium can be. The presence of phosphoric acid stabilizes an intermediate state of the water-soluble trivalent manganese phosphate complex. It is easily oxidized by potassium periodate to heptavalent manganese, which can eliminate the formation of soluble manganese dioxide. This does not add sulfuric acid in the analysis process, simplifying the analysis procedures, to avoid corrosion of clothes,