Preoxidation for colorimetric sensor array detection of VOCs

Hengwei Lin, Minseok Jang, Kenneth S. Suslick

Research output: Contribution to journalArticlepeer-review


A disposable preoxidation technique that dramatically improves the detection and identification of volatile organic compounds (VOCs) by a colorimetric sensor array is reported. Passing a vapor stream through a tube packed with chromic acid on silica immediately before the colorimetric sensor array substantially increases the sensitivity to less-reactive VOCs and improves the limits of detection (LODs) ∼300-fold, permitting the detection, identification, and discrimination of 20 commonly found indoor VOC pollutants at both their immediately dangerous to life or health (IDLH) and permissible exposure limit (PEL) concentrations. The LODs of these pollutants were on average 1.4% of their respective PELs.

Original languageEnglish (US)
Pages (from-to)16786-16789
Number of pages4
JournalJournal of the American Chemical Society
Issue number42
StatePublished - Oct 26 2011

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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