This European Standard specifies the extraction and clean-up procedures of the sampled PCDDs/PCDFs. It is an integral part of the complete measurement procedure. The use of the other two parts EN 1948-1 and EN 1948-3 describing sampling or identification and quantification, respectively, is necessary for the determination of the PCDDs/PCDFs. This European Standard specifies both method validation and a framework of quality control requirements which shall be fulfilled by any PCDD/PCDF extraction and clean- up methods to be applied.