TY - T1 - Ambient measurements of aromatic and oxidized VOCs by PTR-MS and GC-MS : intercomparison between four instruments in a boreal forest in Finland SN - / UR - http://hdl.handle.net/10138/161773 T3 - A1 - Kajos, M. K.; Rantala, P.; Hill, M.; Hellen, H.; Aalto, J.; Patokoski, J.; Taipale, R.; Hoerger, C. C.; Reimann, S.; Ruuskanen, T. M.; Rinne, J.; Petäjä, T. A2 - PB - Y1 - 2015 LA - eng AB - Proton transfer reaction mass spectrometry (PTR-MS) and gas chromatography mass spectrometry GC-MS) are commonly used methods for automated in situ measurements of various volatile organic compounds (VOCs) in the atmosphere. In order to investigate the reliability of such measurements, we operated four automated analyzers using their normal field measurement protocol side by side at a boreal forest site. We measured methanol, acetaldehyde, acetone, benzene and toluene by two PTR-MS and two GC-MS... VO - IS - SP - OP - KW - VOLATILE ORGANIC-COMPOUNDS; REACTION-MASS-SPECTROMETRY; URBAN BACKGROUND SITE; SCOTS PINE FOREST; IN-SITU; EXPERIMENT NOMHICE; FLUX MEASUREMENTS; LONG-TERM; NONMETHANE HYDROCARBONS; BIOGENIC EMISSIONS; 114 Physical sciences N1 - PP - ER -