Národní úložiště šedé literatury Nalezeno 2 záznamů.  Hledání trvalo 0.01 vteřin. 
Electrochemical Biosensors Based on Silver Solid Amalgam for Analysis in Flow Systems
Josypčuk, Oksana ; Barek, J. ; Josypčuk, Bohdan
In this contribution, the construction and preparation of 3 types of flow amperometric enzymatic biosensors based on silver solid amalgam (AgSA) were presented. Two of them consist of the tubular detector and enzymatic reactor of porous or powdered AgSA. The third biosensor was constructed using polished AgSA electrode. Reactors and polished AgSA electrodes were modified with thiols or chitosan and different enzymes were covalently immobilized by suitable techniques. Prepared biosensors were used for determination of ascorbic acid, glucose, hydrogen peroxide, catechol, pyrogallol, dopamine and sarcosine in model samples and in same cases in the real samples.
Construction and Application of Tubular Detector and Porous Flow-through Detector/Reactor of Silver Solid Amalgam for Electrochemical Measurements in Flow Systems
Josypčuk, Oksana ; Barek, J. ; Josypčuk, Bohdan
This paper presents the preparation and application of two new arrangements of silver solid amalgam (AgSA) electrodes for measurements in flow systems  tubular detector based on compact AgSA, and flow-through detector (or reactor) prepared from porous AgSA. Both electrodes were tested for electrochemical determinations of reducible inorganic (Cd2+, Zn2+) and organic (4-nitrophenol, lomustine) compounds under FIA with amperometric detection (Cd2+, Zn2+, 4-nitrophenol) and flow-DPV (lomustine). Furthermore, by combination of the porous reactor with immobilized enzyme and tubular detector the flow amperometric enzymatic biosensor was constructed for determination of glucose in a sample of honey and cholesterol and sarcosine in model samples.

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