期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 161, 期 5, 页码 B98-B101出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.018405jes
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资金
- EPSRC
- British Council UK
The amperometric response of sarcosine was measured in aqueous media containing ferrocene monocarboxylic acid using the redox enzyme sarcosine oxidase (SOD) immobilized in a composite material based on polyvinyl alcohol (PVA) and partially prehydrolyzed tetraethyl orthosilicate (pphTEOS) at the surface of in-house fabricated graphite electrodes. For comparison, separate electrodes consisting of silver and gold nanoparticles (Ag/AuNPs) embedded in the PVA-pphTEOS matrix was prepared employing a novel sol-gel process based on the in situ chemical reduction of Ag or Au ions using PVA both, as a reducing agent and stabilizer. The analytical performance of the enzyme electrodes was studied in terms of linear ranges, sensitivities, response times, limits of detection, reproducibility and stability. (C) 2014 The Electrochemical Society. All rights reserved.
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