Abstract
An evaluation of a porous polymer containing hydrazide groups as a subtractor for aldehydes and ketones in gas chromatography was described. Reactive species were subtracted in the gas phase due to the formation of hydrazone derivatives on the polymer and could be identified by their absence in the chromatograms. The proposed stationary phase had selectivity for aldehydes and ketones, while alcohols, esters, ethers, halides, hydrocarbons and water showed no effect.