Publication Details (including relevant citation information):
|Author(s): Sen A (Sen, Avijit)1, Albarella JD (Albarella, Jeffrey D.)1, Carey JR (Carey, James R.)1, Kim P (Kim, Patrick)1, McNamara WB (McNamara, William B., III)1|
|Source: SENSORS AND ACTUATORS B-CHEMICAL Volume: 134 Issue: 1 Pages: 234-237 Published: AUG 28 2008|
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.
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