Colorimetric sensor array for determination and identification of toxic industrial chemicals - PubMed (original) (raw)

. 2010 Nov 15;82(22):9433-40.

doi: 10.1021/ac1020886. Epub 2010 Oct 18.

Affiliations

• PMID: 20954720
• DOI: 10.1021/ac1020886

Colorimetric sensor array for determination and identification of toxic industrial chemicals

Liang Feng et al. Anal Chem. 2010.

Abstract

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).

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