文章基本信息

标题：Laccase-Based Biosensor Encapsulated in a Galactomannan-Chitosan Composite for the Evaluation of Phenolic Compounds
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作者：Imane Boubezari ; François Bessueille ; Anne Bonhomme 等
期刊名称：Biosensors
电子版ISSN：2079-6374
出版年度：2020
卷号：10
期号：6
页码：70-80
DOI：10.3390/bios10060070
出版社：MDPI Publishing
摘要：Galactomannan, a neutral polysaccharide, was extracted from carob seeds and characterized. It was used for the first time for the fabrication of a laccase-based biosensor by the encapsulation of laccase in a chitosan galactomannan composite. The fabricated biosensor was characterized by FTIR, scanning electron microscopy and cyclic voltammetry. The pyrocatechol detection was obtained by cyclic voltammetry measurements, through the detection of o-quinone at −0.447 V. The laccase activity was well preserved in the chitosan galactomannan composite and the sensitivity of detection of pyrocatechol in the 10−16 M–10−4 M range was very high. The voltammetric response of the biosensor was stable for more than two weeks. To estimate the antioxidant capacity of olive oil samples, it was shown that the obtained laccase-based biosensor is a valuable alternative to the colorimetric Folin–Ciocalteu method.
关键词：galactomannan; chitosan; laccase; voltammetry; phenolic content galactomannan ; chitosan ; laccase ; voltammetry ; phenolic content