Abstract：As carbonate mineral, limestone has great loss on ignition. A series of chemical analysis methods have been developed for the determination of limestone, but the operation process was complex, and the consumption of chemical reagents was large and the analytical time was long for those methods. A method has been developed for the determination of calcium oxide, magnesium oxide, silica oxide, iron oxide and aluminum oxide in limestone by wavelength dispersive X-ray fluorescence spectrometry. Sample and fusion agent were fused under the temperature of 1 050 ℃ for test portion slice preparation, which the ignited sample was used as test portion, lithium tetraborate was used as fusion agent, and the dilution proportion of test portion and fusion agent was 1∶10, 50 g/L of ammonium iodide was used as releasing agent. The reference standard materials of limestone were used as standard test portion for standard curves preparation, and the correlation coefficients of all components were in the range of 0.993 1-0.999 7. Precision of the proposed method (RSD, n=11) was in the range of 0.13%-2.1%, and the results of determination were in good agreement with certified values and the deviation was in the range of 0-0.39%. The proposed method mostly weakened the influence of the determination results, which moisture and carbon dioxide in air were absorbed by the ignited test portion.
褚宁,李卫刚,蒋晓光,张群,林忠,迟成鑫. 熔融制样-波长色散X射线荧光光谱法测定石灰石中主次成分[J]. 冶金分析, 2014, 34(10): 37-41.
CHU Ning, LI Wei-gang, JIANG Xiao-guang, ZHANG Qun LIN Zhong, CHI Cheng-xin. Determination of major and minor components in limestone by wavelength dispersive X-ray fluorescence spectrometry with fusion sample preparation. , 2014, 34(10): 37-41.
