Study on the elimination method of matrix interference during the determination of components in lime materials by X-ray fluorescence spectrometry with pressed powder pellet after ignition
YANG Shao-song
Manufacturing Department of Panzhihua Steel & Vanadium Co., Ltd., Panzhihua 617000, China
Abstract：The calibration curve was plotted using standard sample of lime after high temperature ignition, solving the problems such as lack of certified reference materials for active lime, difficulty to prepare enough production sample with gradient at the same time. The sample was prepared by pressing using sintering lime samples after high temperature ignition. The matrix interference was greatly reduced, and the granularity effect was completely eliminated. The content of calcium oxide, magnesium oxide and silicon dioxide in limestone, active lime and quick lime was determined by X-ray fluorescence spectrometry with pressed powder pellet. The correlation coefficients of calibration curves of calcium oxide, magnesium oxide and silicon dioxide were all higher than 0.999. The precision test was conducted using one active lime sample. The relative standard deviations (RSD, n=11) of three components were between 0.086% and 2.3%. The production samples of quick lime and active lime in sintering process of iron-making were analyzed. The found results were consistent with those obtained by X-ray fluorescence spectrometry with fusion sample preparation. The standard sample of limestone was also analyzed, and the found results were consistent with the certified values after correction.
羊绍松. 粉末灼烧压片-X射线荧光光谱法测定石灰类材料中组分基体干扰的消除方法研究[J]. 冶金分析, 2015, 35(4): 25-29.
YANG Shao-song. Study on the elimination method of matrix interference during the determination of components in lime materials by X-ray fluorescence spectrometry with pressed powder pellet after ignition. , 2015, 35(4): 25-29.
