Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
177826 | Dyes and Pigments | 2009 | 4 Pages |
Abstract
The spectral response of three dyes, in both pH and methanol in strongly acidic environments as examples of the inner media of a proton exchange membrane such as Nafion, was investigated. Picric acid responded predominantly to pH while C.I. Acid Orange 5 and C.I. Basic Green 4 each gave a combined response to both pH and methanol concentration. The spectroscopic results obtained show the feasibility of using a single dye for measuring pH without significant interference from methanol; the simultaneous determination of pH and methanol concentration using a binary combination of dyes is also feasible. These characteristics of the dyes allow their use as primary transducers for a fuel concentration sensor in a direct methanol fuel cell.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Yu.G. Vlasov, S.S. Levichev, A.A. Kruchinin, Bing-Joe Hwang,