Screen Printed Cupric-Hexacyanoferrate Modified Carbon Enzyme Electrode for Single-Use Glucose Measurements
作者:
Joseph Wang,
Xueji Zhang,
期刊:
Analytical Letters
(Taylor Available online 1999)
卷期:
Volume 32,
issue 9
页码: 1739-1749
ISSN:0003-2719
年代: 1999
DOI:10.1080/00032719908542929
出版商: Taylor & Francis Group
关键词: Glucose;Biosensor;Cupric hexacyanoferrate;Screen-printed electrodes
数据来源: Taylor
摘要:
A highly selective disposable glucose biosensor based on the dispersion of cupric-hexacyanoferrate and glucose oxidase within a screen-printable carbon ink is described. The dispersed metal-hexacyanoferrate catalyst offers a marked decrease of the overvoltage for the reduction of the enzymatically-liberated hydrogen peroxide, and a stable response at physiological pH. Such efficient catalytic activity allows tuning of the detection potential to a region (around – 0.1V) where interfering reactions are negligible. Such operation eliminates the need for an anti-interference membrane barrier, and along with the one-step dispersion of the enzyme and electrocatalyst, greatly simplifies the sensor fabrication. The high selectivity and simplified fabrication hold great promise for thick-film biosensors for testing glucose and other important substrates of other oxidases.
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