Development of continuous on-line purge and trap analysis

Chutarat Saridara, Roman Brukh, Somenath Mitra

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


An on-line purge and trap system for continuous monitoring of Volatile Organic Compounds (VOC) is presented. The purge chamber was designed for continuous extraction of VOC from water with nitrogen. The analytes were preconcentrated on a microtrap prior to analysis by GC with flame ionization detection. The microtrap served as a fast injection device for carrying out analysis at high frequency. Continuous monitoring was accomplished by performing injections at fixed intervals. This system showed high sensitivity, high precision, detection limits at the ppb level, and stable response over long periods of continuous operation. Factors affecting system performance were studied. A predictive model based on gas-liquid partitioning is also presented.

Original languageEnglish (US)
Pages (from-to)446-452
Number of pages7
JournalJournal of Separation Science
Issue number3
StatePublished - Feb 2006

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Filtration and Separation


  • GC
  • Microtrap
  • Purge and trap analysis
  • Volatile organics


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