Dual Detection of Glucose Using Commercial Potassium Permanganate and Glucose Oxidase: Colorimetric and Absorbance-Based Approaches.

To further evaluate the colorimetric performance of the KMnO 4 –GOx sensor, spiked glucose samples at concentrations of 1.5, 2.0, and 3.5 mM were analyzed and compared to the established gradient ( Figure c). An overall trend of increasing color change with higher glucose levels was observed, although slight deviations from expected values occurred.

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