Journal
ANALYTICAL SCIENCES
Volume 23, Issue 3, Pages 277-281Publisher
JAPAN SOC ANALYTICAL CHEMISTRY
DOI: 10.2116/analsci.23.277
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In this paper, we describe an amperometric-type enzymeless glucose sensing system based on a nanoporous platinum (Pt) electrode embedded in a microfluidic chip. This microchip system is comprised of a microfluidic transport channel network and a miniaturized electrochemical cell for nonenzymatic glucose sensing. Sample and buffer solutions were transferred to the cell by programmed electroosmotic flow (EOF). A nanoporous Pt electrode with the roughness factor of 200.6 was utilized to determine glucose concentrations in phosphate buffered saline (PBS) by the direct oxidation of glucose, without any separation process. The sensitivity of the developed system is 1.65 mu A cm(-2) mM(-1) in the glucose concentration range from 1 - 10 mM in PBS.
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