Název:
Construction and application of the amperometric uric acid biosensors based on the covalent immobilization of uricase by different strategies
Autoři:
Tvorynska, Sofiia ; Barek, J. ; Josypčuk, Bohdan Typ dokumentu: Příspěvky z konference Konference/Akce: ISC Modern Analytical Chemistry /17./, Prague (CZ), 20210916
Rok:
2021
Jazyk:
eng
Abstrakt: In this work, a promising combination of a biosensor based on the\nenzymatic mini-reactor with the detection principle of four-electron\nreduction of the consumed oxygen at highly negative potential has\nbeen developed for uric acid determination using flow injection\nanalysis. The construction of the biosensor provides a spatial\nsegregation of the biorecognition (uricase-based mini-reactor) and\ndetection (tubular detector of silver solid amalgam (TD-p-AgSA))\nparts. To find out the most appropriate enzyme immobilization\nprotocol, three different strategies of the covalent attachment for\nuricase from Bacillus fastidiosus have been compared. It was found\nthat the biosensor with the mini-reactor based on the covalent\nattachment of uricase via glutaraldehyde to -NH2 functionalized\nmesoporous silica powder MCM-41 showed extremely high stability\n(>1 year) and reusability (at least 600 measurements) The biosensor's\npractical applicability was confirmed by successful determination\nof uric acid in human urine.
Klíčová slova:
amalgam electrode; amperometric biosensor; uric acid Číslo projektu: GA20-01589S (CEP) Poskytovatel projektu: GA ČR Zdrojový dokument: Proceedings of the 17th ISC Modern Analytical Chemistry, ISBN 978-80-7444-089-2
Instituce: Ústav fyzikální chemie J. Heyrovského AV ČR
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Informace o dostupnosti dokumentu:
Dokument je dostupný v repozitáři Akademie věd. Původní záznam: http://hdl.handle.net/11104/0322725