Using a composite membrane for enhanced sensitivity and faster response in on-line membrane extraction microtrap gas chromatography

Lizhong Zhang, Xuemei Guo, Somenath Mitra

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

On-line membrane extraction microtrap (OLMEM) gas chromatography was used for continuous monitoring of volatile organic compounds (VOCs) in water. The aqueous sample flowed through tubular membrane and the VOCs selectively permeated through it. The permeated VOCs were stripped by a carrier gas and transported to a microtrap. The microtrap retained and concentrated the analytes before injecting into a GC. In this study, the performance of a composite membrane was compared with that of a conventional silicone membrane. The advantages of using the composite membrane were higher extraction efficiency and shorter response time. Extraction efficiencies as high as 95% were obtained for compounds such as toluene and trichloroethane.

Original languageEnglish (US)
Pages (from-to)529-540
Number of pages12
JournalEnvironmental Monitoring and Assessment
Volume44
Issue number1-3
DOIs
StatePublished - 1997

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Pollution
  • Management, Monitoring, Policy and Law

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