Aluminum electrode modified with manganese hexacyanoferrate as a chemical sensor for hydrogen peroxide

A chemically modified electrode was fabricated based on manganese hexacyanoferrate (MnHCF) film. The MnHCF was used as a modifier immobilized onto an aluminum electrode. Stability of the electroactive film formed on the Al electrode surface indicated that MnHCF is a suitable material for the preparation of modified electrodes. The analytical applicability of the modified electrode for the determination of hydrogen peroxide was examined. A linear response in concentration range of 6.0 x 10(-7) -7.4 x 10(-3) M (r = 0.9997) was obtained with detection limit of 2.0 x 10(-7) M for the determination of hydrogen peroxide. The modified electrode exhibited a good selectivity for H2O2 in real samples. The mentioned electrode has advantages of being highly stable, sensitive, inexpensive, ease of construction and use. (C) 2001 Elsevier Science B.V. All rights reserved.