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

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Microdialysis membranes (3 mm length x 200 μm 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.

Original languageEnglish (US)
Pages (from-to)123-128
Number of pages6
JournalAnalytical chemistry
Volume80
Issue number1
DOIs
StatePublished - Jan 1 2008

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