吸光度法快速测定钼铁合金中硅、锰、磷

Fast Determination of Silicon,Manganese and Phosphor in Molybdenum-iron by Absorptiometry

试样以稀硝酸溶解，在过硫酸铵存在下氧化硅、磷为正硅酸、正磷酸，棕色二氧化锰沉淀滴加亚硝酸钠溶液还原分解之。定容后，分别以钼蓝光度法测定硅，磷铋钼蓝光度法测定磷，高碘酸钾光度法测定锰。

The sample was dissolved with dilute nitric acid. In the presence of ammonium persulfate, silicon was oxidized into ortho-silicic acid and phosphor into ortho-phosphoric acid, with brown MnO2 to deposit it and nitrous acid solution to be dripped to it to reduce and decompose it. After its volume fixed, the molybdenum blue photometry, phosphor-bismuth-molybdenum-blue photometry and potassium periodate photometry were respectively used to determine silicon, phosphor and manganese.