NEW METHOD OF VAPORIZING VOLATILE ORGANICS FOR GAS

A new vaporizer for organic volatiles is presented. The essential feat ures include the possibility to vaporize only very small analyte quant ities and the release of the analyte gases at extremely constant conce ntrations such providing excellent reproducibility and small contribut ions to the overall experimental noise by fluctuating analyte concentr ation. Since the organic liquids are sorbed into a ceramic material, t here does not occur any aerosol formation, and the sublimation of 'fro zen' liquids (e.g. benzene) is possible. The released analyte concentr ations can be calculated using the common Antoine-equation. The new va porizer additionally allows the determination of unknown saturation va por pressures of organic volatiles. (C) 1997 Elsevier Science S.A. All rights reserved.