Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
743572 | Sensors and Actuators B: Chemical | 2008 | 4 Pages |
Abstract
A simple, rapid and low-cost method for differentiating a wide range of concentrations of gaseous hydrogen sulfide (H2S) is described. A large dynamic range (50 ppb to 50 ppm) was successfully classified at ambient temperature using a colorimetric sensor array comprised of chemoresponsive dyes coupled to a commercially available 8-bit flatbed scanner. Principle component analysis of the composite magnitude and kinetics of color change for the array of dye spots over the entire dynamic range resulted in 100% classification. This was achieved by including chemoresponsive dyes which reacted specifically with H2S at different detection thresholds.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Avijit Sen, Jeffrey D. Albarella, James R. Carey, Patrick Kim, William B. McNamara III,