Abstract：As an additive to steel, ferrochrome is widely used in the process of steel smelting. In some high-quality grade steels, the index requirements of boron element are very strict. Therefore, it is of great significance to accurately determine trace boron content in ferrochrome. The influence of acid type on the sample dissolution was studied in experiments. The hydrochloric acid-nitric acid-hydrofluoric acid system was selected to dissolve samples. Meanwhile, the working parameters (analytical power and atomizing gas flow) were optimized. The influence of analytical lines and matrix effect on the determination results of boron were also studied. B 208.95 nm was finally selected as the analytical line. The matrix matching method was adopted to prepare calibration curve to eliminate the influence of matrix effect. The method for the determination of trace boron in ferrochrome by inductively coupled plasma atomic emission spectrometry (ICP-AES) was established. The linear correlation coefficient (r) of calibration curve was 0.999 4. The limit of detection for boron was 0.000 42%, and the limit of quantification was 0.001 4%. The content of boron in ferrochrome sample was determined according to the experimental method. The relative standard deviation (RSD, n=11) of the results not more than 10%. The recoveries were between 95% and 110%.
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