ISO 29581-2:20 10描述了一种基于性能的方法，用于使用X射线荧光（XRF）对水泥中的SiO2、Al2O3、Fe2O3、CaO、MgO、SO3、K2O、Na2O、TiO2、P2O5、Mn2O3、SrO、Cl和Br进行化学分析。当已经建立了足够的校准时，它可以应用于其他相关元件。 ISO 29581-2:20 10描述了一种用于分析水泥一致性和信息的替代方法，该方法基于熔融样品珠和使用认证参考材料的分析验证以及性能标准。 如果分析性能满足相同的标准，基于未熔融样品的压制颗粒的方法可以被认为是等效的。 熔融珠的使用通常提高了非挥发性元素分析的准确性，因为它消除了由矿物学形式或氧化态的差异引起的可变性。压制颗粒通常提高了挥发性元素分析的准确度，并且可以为非挥发性元素的常规分析提供足够的准确度。 样品中硫化物的存在也导致对可以使用基于熔融珠的XRF技术进行的分析范围的限制。特别地，由于未知量的硫化物对分析的贡献，硫酸盐(SO3)不能直接从这种熔融珠中测定。此外，由于未知量的硫酸盐对分析的贡献以及一些硫化物在熔融过程中可能因挥发而损失的可能性，因此不能直接（或准确地间接）测定硫化物。因此，ISO 29581-1的方法，包括在ISO 29581的附录D中-2:20 10，是测定含硫化物物质样品硫酸盐含量的参考方法。 可以使用其他方法，只要它们根据参考方法或国际公认的参考材料进行校准，以证明它们的等效性。 如有争议，除非各方另有约定，只能使用ISO 29581-1中的参考方法。 ISO 29581-2:20 10描述了主要适用于水泥的方法，但也可适用于其组成材料和其他材料，其标准引用了这些方法。

ISO 29581-2:2010 describes a performance-based method for the chemical analysis of cement for SiO₂, Al₂O₃, Fe₂O₃, CaO, MgO, SO₃, K₂O, Na₂O, TiO₂, P₂O₅, Mn₂O₃, SrO, Cl and Br using X-ray fluorescence (XRF). It can be applied to other relevant elements when adequate calibrations have been established. ISO 29581-2:2010 describes an alternative method for analyses of cement for conformity and information purposes, based on beads of fused sample and analytical validation using certified reference materials, together with performance criteria. A method based on pressed pellets of unfused sample can be considered as equivalent, providing that the analytical performance satisfies the same criteria. The use of fused beads generally improves the accuracy of analysis for non-volatile elements since it eliminates variability arising from differences in mineralogical forms or oxidation states. Pressed pellets generally improve the accuracy of analysis for volatile elements and can give adequate accuracy for the routine analysis of non-volatile elements. The presence of sulfide in a sample also leads to restrictions on the scope of the analysis that can be undertaken using the XRF technique based upon fused beads. In particular, sulfate (SO₃) cannot be determined directly from such a fused bead because of the contribution to the analysis from the unknown amount of sulfide. In addition, sulfide cannot be determined directly (or accurately, indirectly) because of the contribution of the unknown amount of sulfate to the analysis and from the possibility that some sulfide can be lost by volatilization during fusion. Consequently, the method of ISO 29581-1, included as Annex D of ISO 29581-2:2010, is the reference method for determining the sulfate content of samples containing sulfide species. Other methods can be used, provided they are calibrated, either against the reference method or against internationally accepted reference materials, in order to demonstrate their equivalence. In the case of dispute, unless otherwise agreed by all parties, only the reference method in ISO 29581-1 can be used. ISO 29581-2:2010 describes methods that apply principally to cements, but which can also be applied to their constituent materials and to other materials, the standards for which call up these methods.