Colorimetric sensor array for determination and identification of toxic industrial chemicals

Liang Feng, Christopher J. Musto, Jonathan W. Kemling, Sung H. Lim, Wenxuan Zhong, Kenneth S. Suslick

Research output: Contribution to journalArticlepeer-review


A low-cost yet highly sensitive colorimetric sensor array for the detection and identification of toxic industrial chemicals (TICs) has been developed. The sensor consists of a disposable array of cross-responsive nanoporous pigments whose colors are changed by diverse chemical interactions with analytes. Clear differentiation among 20 different TICs has been easily achieved at both their IDLH (immediately dangerous to life or health) concentration within 2 min of exposure and PEL (permissible exposure limit) concentration within 5 min of exposure with no errors or misclassifications. Detection limits are generally well below the PEL (in most cases below 5% of PEL) and are typically in the low ppb range. The colorimetric sensor array is not responsive to changes in humidity or temperature over a substantial range. The printed arrays show excellent batch to batch reproducibility and long shelf life (greater than 3 months).

Original languageEnglish (US)
Pages (from-to)9433-9440
Number of pages8
JournalAnalytical Chemistry
Issue number22
StatePublished - Nov 15 2010

ASJC Scopus subject areas

  • Analytical Chemistry


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