Colorimetric sensor array for determination and identification of toxic industrial chemicals.
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).
Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, United States.
Liang
L
Feng
Christopher J
CJ
Musto
Jonathan W
JW
Kemling
Sung H
SH
Lim
Wenxuan
W
Zhong
Kenneth S
KS
Suslick
D016000:Cluster Analysis; D003124:Colorimetry / Q000295:instrumentation*; D004781:Environmental Exposure / Q000331:legislation & jurisprudence; D006813:Humidity; D007221:Industry; D007287:Inorganic Chemicals / Q000032:analysis* / Q000633:toxicity; D057230:Limit of Detection; D009930:Organic Chemicals / Q000032:analysis* / Q000633:toxicity; D013696:Temperature; D013997:Time Factors
D007287:Inorganic Chemicals; D009930:Organic Chemicals