PACKED CAPILLARY COLUMN SOLVATING GAS-CHROMATOGRAPHY OF ALDEHYDES

The rapid separation of aldehydes of environmental interest was invest igated us:ng packed capillary column solvating gas chromatography (SGC ). Fused-silica capillary columns (250 mu m I.D.) were packed with pol y(dicyanoallylsiloxane)encapsulated 10 mu m spherical porous (80 Angst rom) silica particles. Excellent resolution and good peak shapes were achieved for underivatized aldehydes using carbon dioxide as mobile ph ase. The effects of temperature and pressure on column efficiency and selectivity were studied. Packed capillary SGC gave better resolution of ten standard aldehydes than open tubular gas chromatography using p oly(biscyanopropylsiloxane) as stationary phase, and near-baseline res olution of these aldehydes was obtained in approximately 60 s. (C) 199 8 Elsevier Science B.V. All rights reserved.