scope:

Specifies the extraction and clean-up procedures of the sampled PCDDs/PCDFs. It is integral part of the complete measurement procedure. The use of the other two parts EN 1948-1:1996 and EN 1948-3:1996 describing sampling or identification and quantification, respectively, is necessary for the determination of the PCDDs/PCDFs. This standard has been designed to measure PCDD/PCDF concentrations at about 0,1 ng I-TEQ/m3 in stationary source emissions. Specifies both method validation and a framework of quality control requirements which have to be fulfilled by any PCDD/PCDF extraction and clean up methods to be applied. Some methods are described in detail in Annex A as examples of proven procedures. Each of the three sampling methods can be combined with the extraction and clean-up and the identification and quantification to complete the measurement procedure. During comparison measurements on a municipal waste incinerator at the level of about 0,1 ng I-TEQ/m3 these three methods have been deemend comparable within the expected range of uncertainty. Validation trials were performed on the flue gas of municipal waste incinerators at the level of about 0,1 ng I-TEQ/m3 and a dust loading of from 1 mg/m3 to 15 mg/m3.