Ground based in situ observations of steel_canister at Pallas (Sammaltunturi) (FI0096G). These measurements are gathered as a part of the following projects AMAP, EMEP and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: 1-butene in air (mass_fraction_of_1_butene_in_air), 2-methylpentane in air (mass_fraction_of_2_methylpentane_in_air), 3-methylpentane in air (mass_fraction_of_3_methylpentane_in_air), benzene in air (mass_fraction_of_benzene_in_air), cis-2-butene in air (mass_fraction_of_cis_2_butene_in_air), ethane in air (mass_fraction_of_ethane_in_air), ethene in air (mass_fraction_of_ethene_in_air), ethyne in air (mass_fraction_of_ethyne_in_air), isoprene in air (mass_fraction_of_isoprene_in_air), n-butane in air (mass_fraction_of_butane_in_air), n-hexane in air (mass_fraction_of_hexane_in_air), n-pentane in air (mass_fraction_of_pentane_in_air), propane in air (mass_fraction_of_propane_in_air), propene in air (mass_fraction_of_propene_in_air), trans-2-butene in air (mass_fraction_of_trans_2_butene_in_air)