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Keywords = chromium hexacyanoferrate

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14 pages, 525 KiB  
Article
Effects of Electric Potential Treatment of a Chromium Hexacyanoferrate Modified Biosensor Based on PQQ-Dependent Glucose Dehydrogenase
by Ta-Feng Tseng, Yang-Li Yang, Yuh-Jiuan Lin and Shyh-Liang Lou
Sensors 2010, 10(7), 6347-6360; https://doi.org/10.3390/s100706347 - 28 Jun 2010
Cited by 10 | Viewed by 10325
Abstract
A novel potential treatment technique applied to a glucose biosensor that is based on pyrroloquinoline quinone (PQQ)-dependent glucose dehydrogenase (GDH) and chromium hexacyanoferrate (CrHCF) incorporated into a platinum (Pt) electrode was demonstrated. CrHCF, serving as a mediator, was electrochemically deposited on the Pt [...] Read more.
A novel potential treatment technique applied to a glucose biosensor that is based on pyrroloquinoline quinone (PQQ)-dependent glucose dehydrogenase (GDH) and chromium hexacyanoferrate (CrHCF) incorporated into a platinum (Pt) electrode was demonstrated. CrHCF, serving as a mediator, was electrochemically deposited on the Pt electrode as ascertained by CV, SEM, FTIR and XPS measurements. The potential treatment of CrHCF, which converts Fe(II) to Fe(III), enables the glucose detection. The amperometric measurement linearity of the biosensor was up to 20 mM (R = 0.9923), and the detection sensitivity was 199.94 nA/mM per cm2. More importantly, this biosensor remained stable for >270 days. Full article
(This article belongs to the Special Issue Glucose Sensors)
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