The Role of Chemically Modified Surfaces in the Construction of Miniaturized Analytical Instrumentation 932207
This paper describes the development of a thin-film optical sensor for measuring pH. The indicator behaves as a polyprotic acid with differing optical properties in each of its chemical forms. Together, these properties facilitate the development of an internally calibrated sensor by calculating the ratios of the absorption maximas for each form of the indicator. The covalent immobilization procedure developed demonstrated long term stability of 4 months without recalibration.
Citation: Porter, M., Coldiron, S., and Vaidya, B., "The Role of Chemically Modified Surfaces in the Construction of Miniaturized Analytical Instrumentation," SAE Technical Paper 932207, 1993, https://doi.org/10.4271/932207. Download Citation
Marc D. Porter, Shelley J. Coldiron, Bikas Vaidya
Iowa State University
International Conference On Environmental Systems