Both theoretically and experimentally, the
effect of temperature has been studied and assessed on analytical
characteristics of continuous chromatomembrane
gas extraction of volatile organic compounds from aqueous
solutions with the aim of their subsequent gas chromatographic
determination. It has been found that a rise of
temperature up to 80 °C enables reduction of the detection
limits of alcohols, ketones, and esters by a factor of 10
to 20. If a water vapor condenser is used in the extractant
gas line, then the repeatability of results does not depend
on temperature. The conditions have been optimized for the
continuous headspace chromatomembrane analysis in combination
with gas adsorption (purge and trap) concentration
of analytes.