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A novel H2O2 sensor is achieved by immobilizing horseradish peroxidase (HRP) in an electropolymerized methylene green (PMG) redox film. The electropolymerization of MG is carried out in a neutral phosphate buffer solution with 5×10−5m methylene green (MG) by using a two-step method. The polymer film only occurs on glassy carbon (electrodes and the reason for this is identified. The critical factor...
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