DEVELOPMENT OF A METHOD FOR SIMULTANEOUS DETERMINATIONS OF NITROGEN-OXIDES, ALDEHYDES AND KETONES IN AIR SAMPLES

Nitrogen oxides, aldehydes and ketones are important environmental tox ins which frequently occur together (e.g. in automobile exhaust and in tobacco smoke). In this paper a convenient method for a simultaneous analysis of nitrogen oxides, aldehydes and ketones in air is presented for the first time. This method is based on the well-established and practical 2,4-dinitrophenylhydrazine method for the determination of a ldehydes and ketones. Detection limits for the determination of nitrog en oxides were 10 ppb (v/v) using solid sorbents, 50 ppb (v/v) using i mpingers (sampling at 0.8 1/min for 15 min), and 150 ppb (v/v) using p assive sampling devices (sampling for 4 h).