Amperometric Carbon Paste Biosensors Based on Horseradish Peroxidase and Oxidases
Amperometric carbon paste peroxide sensors based on horseradish peroxidase (HRP) were developed. In the first approach, HRP was chemically modified with polyethylene glycol to improve the stability of the enzyme in the organic paste matrix and compared with native HRP electrode. In the second approach, HRP was "wired" with a redox polymer containing a covalently bound phenoxazine type mediator, to