Piletsky, Sergey A. and Panasyuk, Tatiana L. and Piletskaya, Elena V. and Sergeeva, Tanya A. and El’skaya, Anna V. and Pringsheim, Erika and Wolfbeis, Otto S. (2000) Polyaniline-coated microtiter plates for use in longwave optical bioassays. Fresenius' Journal of Analytical Chemistry 366 (8), pp. 807-810.
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A technique for coating the wells of microtiterplates with polyaniline layers and with polyaniline/enzyme layers is presented. The resulting wells are shown to be useful for assaying enzyme substrates (as exemplified for glucose via pH) and hydrogen peroxide (via the redox properties of the film). Analyte detection is based on monitoring the absorption spectra of the polyaniline, which turn purple as a result of redox processes, or green on formation of acids by enzymatic reactions. Hydrogen peroxide (a species produced by all oxidases) and glucose (which yields protons on enzymatic oxidation) have been determined in the millimolar to micromolar concentration range. High sensitivity, film stability and good reproducibility of the measurements make the system an attractive alternative to existing biosensing schemes.
|Institutions:||Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik > Chemo- und Biosensorik (Prof. Otto S. Wolfbeis)|
|Subjects:||500 Science > 540 Chemistry & allied sciences|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||06 Jun 2011 13:01|
|Last Modified:||21 Jul 2011 02:14|