Journal
ANALYTICAL LETTERS
Volume 43, Issue 13, Pages 2019-2030Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00032711003704263
Keywords
Amperometric sensor; Horseradish peroxidase (HRP); Multiwalled carbon nanotubes (mwcnts); Ormosil modified electrodes
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Funding
- C.S.I.R., New Delhi [01(1983)/05/EMR-II]
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We herein report an electrochemical hydrogen peroxide sensor based on horseradish peroxidase immobilized in organically modified sol-gel glass (ormosil) with mediator ferricyanide along with multiwalled carbon nanotubes (mwcnts). The ormosil material is converted to fine powder followed by incorporation within graphite paste electrode. The electrochemistry of redox materials encapsulated within ormosil has been studied. The requirement of mwcnts is examined. The ormosil prepared with optimum concentration of mwcnts shows better redox electrochemistry as compared to that made without mwcnts. The biosensor has been characterized by cyclic voltammetry and chroanoamperometry. The performance, stability, and reproducibility of a new peroxide biosensor are reported.
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