scope:

Specifies the sampling of PCDDs/PCDFs. It is an integral part of the complete measurement procedure. The use of the other two parts EN 1948-2:1996 and EN 1948-3:1996 describing extraction and clean-up and identification and quantification, respectively, is necessary for the determination of the PCDDs/PCDFs. Has been developed to measure 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 sampling. The user has the possibility to choose between three different methods: Filter/Condenser Method, Dilution method, Cooled probe method. Each sampling method is illustrated by some sampling systems described in detail in Annex B as examples of proven procedures. During comparison measurements on municipal waste incinerators at the level of about 0,1 ng I-TEQ/m3 these three methods have been deemed 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.