Colorimetric Sensor Array for Determination and Identification of Toxic Industrial Chemicals
环境化学
作者
Liang Feng,Christopher J. Musto,Jonathan W. Kemling,Sung H. Lim,Wenxuan Zhong,Kenneth S. Suslick
出处
期刊:Analytical Chemistry [American Chemical Society] 日期:2010-10-18卷期号:82 (22): 9433-9440被引量:172
标识
DOI:10.1021/ac1020886
摘要
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).