A Plant Tissue Electrode Based on the Use of Chemical Mediators

In this study two plant tissue electrodes were made by the author using a graphite base electrode modified with ferrocene and methyl blue. The tissue slices of mushroom and banana used for the source of enzyme all contain polyphenol oxidase, and results for the determination of o-diphenol are satisfactory. The linear ranges of both biosensors are 2×10−5mol/L to 3×10−2mol/L, and have more than one month's life.