scope:

NEN-EN 1948-4 specifies sampling from stationary sources, extraction, clean-up, identification and quantification procedures of the dioxin-like PCBs. The procedure described lays down requirements to measure the PCB congeners given in Annex A (see Table A.1). It is applicable to the 12 non- and mono-ortho PCB designated by the WHO. It is optimised to measure PCB concentrations of about 0,01 ng WHO-TEQ_PCB/m3. In addition to the 12 non- and mono-ortho-PCB the present document is also applicable to measure further PCB-congeners like the "marker PCB" 28, 52, 101, 138, 153, 180 (see Annex F). This document specifies a framework of quality control requirements for any PCB sampling, extraction, clean-up, identification and quantification methods to be applied. As a result of their similar chemical behaviour PCBs, as shown in the validation campaign, can be sampled from stationary sources together with the PCDDs/PCDFs. Therefore, it is possible to measure PCBs together with PCDDs/PCDFs by applying EN 1948-1, -2, -3 and -4. The complete sampling procedure is described in EN 1948-1. Each of the three sampling methods of EN 1948-1 can be combined with the methods described in this document to complete the measurement procedure. EN 1948-1 is an integral part of the complete measurement procedure and is necessary for the determination of PCBs.