Stationary source emissions. Determination of the mass concentration of PCDDs/PCDFs & dioxin-like PCBs. Long-term sampling of PCDDs/PCDFs & PCBs Air pollution, Industrial air pollutants, Pollutant gases, Combustion products, Gas analysis, Determination of content, Chemical analysis & testing, Stationary, Emission, Toxic materials, Toxicity, Polychlorinated biphenyls, Extraction methods of analysis, Samples, Quality control,