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Microbial Sensor for Determination of Tannic Acid

✍ Scribed by Yi Bin Zhao; Meng Liang Wen; Shi Qing Liu; Zhi Hua Liu; Wu Di Zhang; Yun Yao; Chang Yi Wang

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
66 KB
Volume
60
Category
Article
ISSN
0026-265X

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✦ Synopsis

A fungus biosensor based on an oxygen electrode and Aspergillus ustus immobilized in poly(vinyl alcohol) was developed to determine tannic acid in a batch system. The optimum temperature was 30.0Β°C and the optimum pH was 7.0 in 0.10 M phosphate buffer. The regression equation of the calibration curve between 0.0250 and 1.025 mM was Ν‘x ln yΝ’ Ν‘Οͺ0.72724Οͺx 0.53 /54Ν’ Ο© CΝ‘x ln yΝ’ Ν‘Οͺ0.21891Οͺx 0.08 / 2Ν’ Ο­ A Ο© B/x (r Υ† 0.99985). The sensor had a life of at least 2 weeks; it yielded a negligible response to the compounds commonly coexisting with vegetable tannins.

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