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从表1可知样品中含有大量的二氧化硅若用碱熔融样品则耗费电量大,我们用氢氟酸溶解样品可节电。溶好的样品在2～8％的磷酸介质中,用高碘酸钾作氧化剂,将锰(Ⅱ)氧化为MnO_4~-,生成的高锰酸根的紫色溶液深度与锰含量成正比,进行比色测定。一、试剂及仪器磷酸、高碘酸钾、锰标准溶液100微克/毫升721型分光光度计(上海第三分析仪
It can be seen from Table 1 that the sample contains a large amount of silicon dioxide. If the sample is melted by alkali, the power consumption is large. We can save the sample by hydrofluoric acid to dissolve the sample. The dissolved samples oxidize manganese (II) to MnO_4 ~ - in 2 ~ 8% phosphoric acid medium with potassium periodate as oxidant, the depth of the generated purple solution of permanganate is proportional to the manganese content, and the ratio Color measurement. First, reagents and equipment Phosphoric acid, potassium periodate, manganese standard solution 100 micrograms / ml 721 spectrophotometer (Shanghai Third Analyzer