粉末压片-X射线荧光光谱法与红外吸收光谱法联合测定萤石中各组分

采用粉末直接压片法,用X-射线荧光光谱法1]测得萤石中Ca总量,Fe2O3,P,SiO2,K2O的含量,再用红外吸收光谱法测得样品中碳含量,换算得到CaCO3中的钙含量,进一步求得萤石中CaF2含量。此方法简便、准确。用9个标准物质制定了工作曲线,并进行了自测,另用该系列中5号样品(GBW07254)进行准确度和精密度测试,结果令人满意。

Analysis of Component in Fluorite Using Pressed Powder Pellet X-ray Fluorescence Spectrometry Combined with Infrared Spectroscopy

After fluorite powder was directly pressed into pellet, the total content of Ca and the contents of Fe2O3,P,SiO2 and K2O were all analyzed with X-ray fluorescence spectrometry. Furthermore, the carbon content of the pellet was analyzed with infrared absorption spectrometry. Based on the carbon content in the pellet, the calcium content in CaCO3 was calculated. Then the CaF2 content in fluorite were obtained. This method is simple and accurate. A working curve was made using nine certified reference material and used to test the method. In addition, the NO 5# in the certified reference material series (GBW07254) was used to test the accuracy and precision of the method and the results are satisfactory.