Abstract：As a kind of high temperature welding material, the nickel-boron alloy is widely used in many fields such as aerospace, iron and steel metallurgy, petrochemical industry, energy and electric power. The mechanical properties of nickel-boron alloys are affected by the content of boron. Therefore, it is very important to accurately determine the boron content in nickel-boron alloys. The sample was decomposed with aqua regia. The content of boron was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) in the medium of 10% aqua regia. The determination method of boron in nickel-boron alloy by ICP-AES was established. The experimental results show that the determination was not interfered by nickel when its mass concentration in sample solution was less than 2500μg/mL. The contents of other coexisting elements were low and had no interference with the determination. The linear range of calibration curve was 0.25-25.00μg/mL with linear correlation coefficient of 0.99995. The limit of detection was 2.0μg/g. The proposed method was applied for the determination of boron (0.55%-9.81%) in nickel-boron alloys. The relative standard deviations (RSD, n=11) of determination results were between 0.92% and 4.9%. The content of boron in nickel-boron alloy sample was determined by proposed method, titration method and spectrophotometry, respectively. And the measurement results were basically the same.
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