“…The status and application of methods for the analysis of carbonyl compounds in air pollution and source effluents have been reviewed (Lodge, 1961;Altshuller, 1963Altshuller, , 1965. Since the work reported here was completed, Oberdorfer (1967) determined carbonyl compounds in automobile exhaust gas by recovering and weighing 2,4-dinitrophenylhydrazine de-rivatives from a gas scrubber.…”