China Nonferrous Metallurgy

The existing analysis methods have problems such as significant interference from elements, miscellaneous steps, and long time. The method was established to determine the content of B, Fe, Si and Al in nickel boron alloys by ICP-OES. We explored the dissolution method of the sample and selected the optimal wavelength for each element through coexisting element interference and blank experiments. The following main conclusions were drawn.The sample was decomposed using aqua regia dissolution and alkali melting residue method, and the sample was completely dissolved. The measured solution had low salt content, and the lower limit of each element could meet the analysis requirements. Detecting each element at the selected wavelength, the determination limit of Fe, Si and Al were 0.0090μg/mL, 0.039μg/mL and 0.018μg/mL.According to the method, the recovery rates of B, Fe, Si and Al are 88% to 106%. The relative standard deviations (RSD,n=11) of actual sample were between 0.54% and 9.6%. Meanwhile the content of B, Fe, Si and Al in nickel boron alloys was also determined by volumetric method,atomic absorption spectroscopy, spectrophotometry and ICP-MS method, the results were basically consistent with those obtained by the experimental method．This research method can be used for simultaneous determination of multiple elements, which is simple, fast, accurate, and reliable. It can be used as the main analytical method for detecting the main content and important impurity element content indicators of nickel boron alloys.