主要用于铝生产的冰晶石.元素测定.使用压制粉末片剂的波长色散X射线荧光光谱测定法

[中文适用范围]： 本文件规定了测定冰晶石（Na3AlF6）中氟含量到微量元素含量的波长色散X射线荧光光谱（XRF）方法。 本方法未规定校准参考物质。 该方法适用于冰晶石，冰晶石主要用于生产铝。 附录 A 提供了将元素转换为化合物的转换系数。 浓度超出这些范围的测试结果的有效性和精确度尚未确定。 氟（以F表示）的浓度范围为510g/kg至560g/kg。 铝的浓度范围（以Al表示）为120g/kg至150g/kg。 钠（以 Na 表示）的浓度范围为 270 g/kg 至 330 g/kg。 硅（以 SiO2 表示）的浓度范围为最低检测限 (LLD) 至 4.0 g/kg。 铁（以 Fe2O3 形式给出）的浓度范围为 LLD 至 0.37 g/kg。 硫的浓度范围（以 ISO 4 给出）为 LLD 至 5.0 g/kg。 磷的浓度范围（以 P2O5 表示）为 LLD 至 0.40 g/kg。 钙（以 CaO 形式给出）的浓度范围为 LLD 至 0.80 g/kg。 [外文原描述]： This document specifies a wavelength-dispersive X-ray fluorescence spectrometric (XRF) method for the determination of cryolite (Na 3 AlF 6 ) from the content of fluorine to the content of trace elements. The calibration reference materials are not specified in this method. The method is applicable to cryolite, which is primarily used for the production of aluminium. Annex A provides conversion factors for converting elements to compounds. The validity and precision of test results for concentrations outside these ranges has not been determined. The concentration range of fluorine (given as F) is from 510 g/kg to 560 g/kg. The concentration range of aluminium (given as Al) is from 120 g/kg to 150 g/kg. The concentration range of sodium (given as Na) is from 270 g/kg to 330 g/kg. The concentration range of silicon (given as SiO 2 ) is from the lowest limit of detection (LLD) to 4,0 g/kg. The concentration range of iron (given as Fe 2 O 3 ) is from LLD to 0,37 g/kg. The concentration range of sulfur (given as SO 4 ) is from LLD to 5,0 g/kg. The concentration range of phosphorus (given as P 2 O 5 ) is from LLD to 0,40 g/kg. The concentration range of calcium (given as CaO) is from LLD to 0,80 g/kg.