Micro-Enzyme Electrode Prepared on Platinized Platinum

Micro-enzyme electrode with high performance was fabricated on a micro-platinum electrode surface (diameter = 50 ∼ 200 μm) by taking advantage of very huge surface of platinized platinum. Glucose oxidase was incorporated into the micropores of platinum particle by immersing a micro-platinized platinum electrode in a solution containing glucose oxidase. The micro-enzyme electrode for glucose demonstrated high performance such as high sensitivity (the least detectable limit : 5 × 10 −7 M), fast responsiveness (100 % response : 3 sec), and accuracy (C.V. = 1.4 %) in the repeated determination of glucose.