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The wet effluent diffusion denuder technique (WEDD), for the determination of α- and β-pinenes, S-limonene, α-phellandrene, camphene and Δ 3 -carene in air has been tested. These monoterpenes were continuously preconcentrated into a thin film of methanol (ethanol, 1-propanol and heptane) flowing down the inner wall of the cylindrical wet effluent diffusion denuder. The concentrates were analyzed...