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Analytical Features of the Optical Biosensor for Glucose Detection
Maixnerová, Lucie
The first aim of my work was to determine boundaries of the above-mentioned parameters as maxima and minima of the weight (thickness) of the layer and the quantity of the immobilized enzyme. Glucose oxidase from Aspergilus niger (37.7 KU⋅g−1 solid) immobilized on Sepabeads® (SPB) coated together with the ruthenium oxygen sensitive complex in the organic-inorganic polymer ORMOCER® were used in all experiments. From process parameters maxima and minima concentrations of oxygen and glucose were detected. The second aim was to prepare biosensors with substantially diverse analytical characteristics via combinations of these parameters. The obtained experimental data will be a base for a detailed mathematical model of MATINOES biosensors (outlined in our previous paper1), which we are going to develop in the collaboration with ICT Prague. This model should enable a preparation of MATINOES biosensors with tailor-made analytical features.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22015061709372 - PDF
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Enzymatic Sensor of Biogenic Amines with Optical Oxygen Transducer
Maixnerová, Lucie ; Horvitz, Alexandar ; Kuncová, Gabriela ; Přibyl, M. ; Šebela, M. ; Koštejn, Martin
The biogenic amines (BA) are formed by the decarboxylation of amino acids. Because of their impact on human health, they have been used as markers for assessing the freshness and quality of a wide variety of protein-containing products. We studied biosensor for BA with an optical oxygen transducer that contained a diamine oxidase from pea and ruthenium complex. Both active components were incorporated in chemically stable polymer to form sensitive films thickness of 100 - 200 μm. With aim to optimize a composition and manufacturing of the biosensor we developer a mathematical model of processes inside the sensing film. The developed mathematical model revealed qualitative dependencies of the biosensor behavior (sensitivity, response time and dynamic range) on the (i) thickness of the sensitive layer, (ii) concentrations of substrates in the solution, (iii) enzyme activity in the layer and (iv) layer permeability for the substrates.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22015011213553 - PDF
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