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Aplikace elektrochemických metod při analýzách koření
Authors: Metelka Radovan | Jashari Granit | Sýs Milan | Bínová Monika
Year: 2024
Type of publication: článek ve sborníku
Name of source: Bezpečnosť a kvalita potravín : zborník vedeckých prác
Publisher name: Garmond Nitra
Place: Nitra
Page from-to: 328-332
Titles:
Language Name Abstract Keywords
cze Aplikace elektrochemických metod při analýzách koření Byly vyvinuty nové elektrochemické metody pro analýzu látek obsažených v koření pomocí elektrod na bázi uhlíku. Metoda pro stanovení trans-anetholu je založena na anodické oxidaci této látky v acetonitrilu na uhlíkové pastové elektrodě modifikované dodecylsulfátem sodným (40 % hm.). Elektrochemická detekce safranalu byla provedena v organických elektrolytech na elektrodách ze skelného uhlíku a borem dopovaného diamantu. trans-Anetol; Safranal; Uhlíková pastová elektroda; Elektroda ze skelného uhlíku; Borem dopovaná diamantová elektroda; Voltametrie
eng Application of Electrochemical Methods in Analyses of Spices New electrochemical methods for analyzing substances present in spices using carbon-based electrodes were developed. The method for determining trans-anethole is based on the anodic oxidation of the compound in acetonitrile at a carbon paste electrode modified with sodium dodecyl sulfate (40 % w/w). The mechanism of the electrochemical oxidation was elucidated using a glassy carbon electrode. The voltammetric determination of trans-anethole under optimal conditions was characterized by the linear range of 2.3−196.1 µmol L−1, the sensitivity of 0.1122 µA L µmol−1, and the detection limit of 0.7 µmol L−1. The standard addition method was used to assay the analyte in anise and fennel seeds, and the results agreed with a reverse-phase HPLC. Electrochemical detection of safranal, which is present in saffron spice, was carried out at glassy carbon (GCE) and boron-doped diamond (BDD) electrodes in organic solvents. The sensitivity of the detection was higher at the GCE than at BDD and in acetonitrile than in ethanol, respectively. A linear range of 1−300 µmol L−1 of safranal was achieved at the GCE. trans-Anethole; Safranal; Carbon paste electrode; Glassy carbon electrode; Boron-doped diamond electrode; Voltammetry

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