钼兰光度法测定Ni-Fe-Si-B非晶中硅含量

本文应用光度法对Ni-Fe-Si-B非晶中硅含量的测定进行了研究.试样料在微酸性溶液中,硅酸与钼酸铵生成硅钼杂多酸,饱和硼酸络合过量氟离子,再用草酸-硫酸亚铁铵还原成硅钼蓝,在680 nm波长条件下进行比色分析.实验结果表明,本方法测定结果与重量法测定结果相符吻合,能满足非晶中中硅含量的测定.

Determination of Quantity of Silicon Contained in Amorphous Ni-Fe-Si-B by Photometric Method

The determination of the quantity of silicon contained in amorphous Ni-Fe-Si-B has been investigated according to applied photometric method.The sample is put into the thin acid solution,and silicic acid can be reacted with molybdic acid to generate silicon-molybdenum heteropoly acid in thin acid solution.After the saturated boric acid is mixed with extra fluoride ions,ferrous ammonium sulphate can be reduced to silicon-molybdenum blue with the help of oxalic acid,and then the colorimetric analysis can be obtained at the wavelength of 680 nm.The experiment showed that the data by means of the appied photometric method is the same as that by the gravimetric determination.The applied photometric method can be used to measure the quantity of silicon in middle content.