New method of vaporizing volatile organics for gas

A new vaporizer for organic volatiles is presented. The essential features include the possibility to vaporize only very small analyte quantities and the release of the analyte gases at extremely constant concentrations such providing excellent reproducibility and small contributions to the overall experimental noise by fluctuating analyte concentration. Since the organic liquids are sorbed into a ceramic material, there does not occur any aerosol formation, and the sublimation of 'frozen' liquids (e.g. benzene) is possible. The released analyte concentrations can be calculated using the common Antoine-equation. The new vaporizer additionally allows the determination of unknown saturation vapor pressures of organic volatiles. (C) 1997 Elsevier Science S.A. All rights reserved.