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A polyion complex membrane containing physically entrapped microperoxidase and ferrocene was prepared on a glassy carbon electrode. A reductive current response for H 2 O 2 was obtained under the application of 0.0 V versus Ag|AgCl. The current response was proportional to the H 2 O 2 concentration up to 20 μM, and the lower detection limit was 0.5 μM (S/N=5). The interference...
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