Determination of magnesium, manganese, silicon, titanium, calcium,iron in rare earth-magnesium intermediate alloy by X-rayfluorescence spectrometry with pressed powder pellet
BU Zhao-jie1,2,3,JIANG Chun-hong1,2,3,TAO Ze-xiu1,2,3,KOU De-xiang1,2,3,KANG Qiang1,2,3
1. LS Test Technology Co., Ltd., Lanzhou 730314, China; 2. Gansu Engineering Laboratory ofMaterials Characterization and Safety Evaluation for Machinery Equipment, Lanzhou 730314, China; 3. Gansu Engineering Technology Research Center of High-end Castings and Forgings, Lanzhou 730314, China
Abstract：The sample was prepared with pressed powder pellet. The contents of Mg, Mn, Si, Ti, Ca and Fe in rare earth-magnesium intermediate alloy were determined by X-ray fluorescence spectrometry (XRF). The mineral effect, sample granularity and forming experiment were analyzed and investigated. The experiments showed that the influence of mineral effect was insignificant when the calibration curve was prepared with certified reference materials from different producing area. The influence of granularity effect could be well solved by grinding the sample to not more than 74μm. The precision tests indicated that the relative standard deviations (RSD, n=10) of tested components were not more than 2.8%. The accuracy was investigated with samples from different producing area. The results were consistent with those obtained by national standard method. The proposed method could meet the requirements of allowed tolerance for each component in rare earth-magnesium intermediate alloy specified in GB/T 16477—2010.
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