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Simple and reliable biosensor for determination of glucose in alcoholic beverages (CROSBI ID 169788)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Ninčević Grassino, Antonela ; Milardović, Stjepan ; Grabarić, Zorana ; Grabarić, Božidar S. Simple and reliable biosensor for determination of glucose in alcoholic beverages // Food research international, 47 (2012), 2; 368-373. doi: /10.1016/j.foodres.2011.10.004

Podaci o odgovornosti

Ninčević Grassino, Antonela ; Milardović, Stjepan ; Grabarić, Zorana ; Grabarić, Božidar S.

engleski

Simple and reliable biosensor for determination of glucose in alcoholic beverages

The objective of this work was to determine the glucose in alcoholic beverages using the simple and reliable glucose oxidase (GOx) biosensor. Glucose oxidase was immobilized on the surface of modified graphite electrode in mixed photocurable polymeric membranes of polyacrylamide (PAA)/polyvinylpyrolidone (PVP), taking advantage of both immobilizations ; higher activity due to enzyme entrapment (PVP) and longer life of biosensor due to covalent bonding of enzyme (PAA). The surface of graphite electrode was modified with electrodeposited layer of indium(III) and iron(III) hexacyanoruthenate film to get faster electron transfer through the surface layer of the modified electrode. Voltammetric and amperometric measurements were performed under batch conditions. The response of biosensor was measured as a function of selected organic solvents (methanol, ethanol and isopropanol) containing phosphate buffer solution (pH = 6.5) at -100 mV against a reference Hg˝Hg2Cl2˝3 M KCl electrode. Addition of 10 % of methanol and ethanol increased, while higher volume fractions decreased the biosensor response. On the other hand isopropanol (10 %) decomposed the photopolymeric membrane. Therefore, the determination of glucose in alcoholic beverages has been performed in phosphate buffer with 10 % of ethanol. The linear range was obtained up to 0.8 mM (R2 = 0.9925) for mixed solvents, as well as phosphate buffer (R2 = 0.9996). The simple, fast and easy preparation of the biosensor, high activity and long life, if glucose was immobilised in mixed polymeric photocurable membrane, and reasonably accurate glucose determination, make the proposed procedure appropriate for quality control of the alcoholic beverages in mixed solvents.

alcoholic beverages; glucose; enzyme electrode; polymeric membranes; polyvinylpyrolidone; polyacrylamide

Rad je prezentiran na skupu 15th IUFoST World Congress of Food Science & Technology – Food Science Solutions in an Evolving World ; Gunnar Sigge, Geoffrey Campbell-Platt, Mary Schmidl, Nick Starke, Samson Agboola (ur.).

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Podaci o izdanju

47 (2)

2012.

368-373

objavljeno

0963-9969

/10.1016/j.foodres.2011.10.004

Povezanost rada

Kemija

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