Abstract：The key to the determination of high-arbon ferrochrome by X-ray fluorescence spectrometry lies in the preparation of glass bead. It is necessary to ensure the complete melting of the sample and avoid the etching of platinum-gold crucible. There was no need to prepare additional flux crucible. The lithium tetraborate and boron oxide with appropriate proportion were used for bedding. The sample was mixed uniformly with the oxidant of lithium hydroxide, boron oxide and strontium nitrate, and then covered with lithium tetraborate. The homogeneous glass bead which could meet the determination requirements was obtained by selection of the proper melting program. Total of 13 samples, including 4 high-carbon ferrochrome certified reference materials,7 high-carbon ferrochrome samples with fixed values determined by standard method of GB/T 4699, and 2 synthetic high-carbon ferrochrome samples prepared by mixing high purity iron and high-carbon ferrochrome according to certain mass ratio, were selected to draw the calibration curve. Thus, a method for determination of chromium, silicon, phosphorus and titanium in high-carbon ferrochrome was established by X-ray fluorescence spectrometry (XRF). The linear correlation coefficients were all greater than 0.996. The proposed method was applied to the determination of certified reference materials and actual samples of high-carbon ferrochrome. The results were basically consistent with the standard values for certified reference materials. For the actual samples, the relative standard deviations (RSD, n=5) were between 0.15% and 3.4%, and the results were consistent with those obtained by the standard method of GB/T 4699.
张延新, 李京, 刘斌, 刘政鹏. 熔融制样-X射线荧光光谱法测定高碳铬铁中铬硅磷钛[J]. 冶金分析, 2022, 42(12): 77-82.
ZHANG Yanxin, LI Jing, LIU Bin, LIU Zhengpeng. Determination of chromium,silicon,phosphorus and titanium in high-carbon ferrochrome by X-ray fluorescence spectrometry with fusion sample preparation. , 2022, 42(12): 77-82.
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