本欧洲标准规定了固体回收燃料的三种消化方法: a）用氢氟酸，硝酸和盐酸混合物微波辅助消化; b）用氢氟酸，硝酸和盐酸混合物进行热水浴消化，灰分析出SRF样品; c）用硝酸，高氯酸和氢氟酸混合物进行烘箱消解。 Si，Al，K，Na，Ca，Mg，Fe，P和Ti的仪器测定通过电感耦合等离子体光谱法进行光学检测或其他合适的光谱技术如火焰原子光谱。 通过对剩余残留物的定性X射线荧光（XRF）分析可以验证消化的有效性。如果需要，应使用替代消化方法（提出的方法）。 XRF可用于对样品灰化（550°C）后的Si，Al，K，Na，Ca，Mg，Fe，P，Ti进行分析:其他元素可以通过XRF进行分析，条件是浓度水平超过了XRF仪器的检测限值，并经过适当的初步测试。 方法a）推荐用于一般用途，但在高浓度有机物的情况下，测试部分的量可能非常低。方法b）建议用于高有机物质的SRF

This European Standard specifies three methods of digestion for solid recovered fuels: a) microwave assisted digestion with hydrofluoric, nitric and hydrochloric acid mixture; b) hot water bath digestion of with hydrofluoric, nitric and hydrochloric acid mixture, after ashing of the SRFs sample; c) oven digestion with nitric, perchloric and hydrofluoric acid mixture. Instrumental determination of Si, Al, K, Na, Ca, Mg, Fe, P, and Ti is performed by Inductively Coupled Plasma Spectrometry with optical detection or other suitable spectroscopic techniques such as Flame Atomic Spectroscopy. The effectiveness of the digestion can be verified by qualitative X-ray fluorescence (XRF) analysis on the remaining residue. If necessary an alternative digestion method (among those proposed) shall be used. XRF can be used for the analysis of Si, Al, K, Na, Ca, Mg, Fe, P, Ti, after ashing (550 °C) of the sample: other elements can be analysed by XRF provided that the concentration levels are above the instrumental detection limits of the XRF instrumentation and after proper preliminary testing. Method a) is recommended for general use, but the amount of the test portion can be very low in case of high concentration of organic matter. Method b) is recommended for SRFs with high organic matter concentration that can be difficult to digest with the other methods. Method c) is recommended for SRFs samples for which the other methods leave a significant insoluble residue. All the listed methods are suitable for the determination of Si, provided that closed containers are used for sample dissolution. XRF is highly recommended for Si, P and Ti analysis. Alternative digestion methods can be applied if their performance is proved to be comparable with those of the methods mentioned in a) to c) (see Annex C).