Analysis and monitoring of volatile analytes from aqueous solutions by extractions into the gas phase using microdialysis membranes and coupling to fast GC

Melissa A Jones; Ashley Kramer; Matthew Humbert; Tyler Vanadurongvan; Jonathan Maurer; Michael T Bowser; Anthony J Borgerding

doi:10.1021/ac071530h

Analysis and monitoring of volatile analytes from aqueous solutions by extractions into the gas phase using microdialysis membranes and coupling to fast GC

Anal Chem. 2008 Jan 1;80(1):123-8. doi: 10.1021/ac071530h. Epub 2007 Nov 22.

Authors

Melissa A Jones¹, Ashley Kramer, Matthew Humbert, Tyler Vanadurongvan, Jonathan Maurer, Michael T Bowser, Anthony J Borgerding

Affiliation

¹ Department of Chemistry, University of St. Thomas, St. Paul, Minnesota 55105, USA.

PMID: 18031020
DOI: 10.1021/ac071530h

Abstract

Microdialysis membranes (3 mm lengthx200 microm i.d.) have been used to extract volatile analytes from aqueous samples into the gas phase and interfaced with fast gas chromatography. Gas-phase extracts generated from aqueous samples reach steady-state concentrations and are transported to the detector in 5 s. The recovery of the system ranges from 1.28% for toluene to less than 0.1% for ethanol. The lowest detectable concentration without preconcentration was 5 mM for most compounds using a flame ionization detector, and as low as 0.01 mM for more volatile hydrophobic analytes. When interfaced with a fast GC system, changes in aqueous phase concentrations were monitored with a temporal resolution of 10 s.