Piezoelectric resonance sensor for the determination of ammonium in aqueous environment | Zendy

DURKUT Serap ŞEKER | Zendy

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Piezoelectric resonance sensor for the determination of ammonium in aqueous environment

Author(s) -

DURKUT Serap ŞEKER

Publication year - 2016

Publication title -

communications faculty of science university of ankara series b chemistry and chemical engineering

Language(s) - English

Resource type - Journals

ISSN - 1303-6017

DOI - 10.1501/commub_0000000553

Subject(s) - quartz crystal microbalance , nanofiber , quartz , plga , materials science , urease , scanning electron microscope , aqueous solution , ammonium , urea , chemical engineering , crystal (programming language) , chemistry , analytical chemistry (journal) , inorganic chemistry , nanotechnology , chromatography , organic chemistry , nanoparticle , composite material , adsorption , computer science , engineering , programming language

In this study, a novel ammonium biosensor based on quartz crystal microbalance (QCM) system for determination of ammonium ion, a reaction product of urea by urease was described. Piezoelectric quartz crystals were coated with poly(lactic-co-glycolic acid) (PLGA; 85:15) nanofiber containing fullerene C60. Then, urease (EC 3.5.1.5) was immobilized on nanofibrous electrospun PLGA membrane. The nanofibers were characterized using scanning electron microscopy. Changes in the resonance frequency of the PLGA/C60–coated quartz crystal were evaluated as an indicator of changes in urea concentration. The oscillating frequency decreased accordingly to the deposition of ammonium on the quartz crystal surface. Our results indicate that the PLGA/C60 nanofiber coated piezoelectric sensor exhibited ability to determine the ammonium ion in the solution.

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