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A novel saccharide sensor that shows a distinct color change resembling a “traffic signal” was developed. By copolymerizing a boronic acid monomer and an amine monomer on a glass plate, a boronic acid-containing thin film was obtained. After adsorbing anionic blue and yellow dyes, the thin film was immersed in aqueous saccharide solutions containing a cationic red dye. As saccharide concentration...
In order to explore the performance of the analytical method called in situ quantitative nuclear magnetic resonance spectroscopy – is q NMR – the distribution of glucose, fructose and sucrose in various parts of a carrot root (Daucus carota L.) – primary xylem, secondary xylem, phloem, cortex; top part and lower part – was determined. The influence on the quality of spectra of drying samples before...
As the concentration of reducing sugars (RS) is controlled by European legislation for certain specific food and beverages, a simple and sensitive spectrophotometric method for the determination of RS in various food products is proposed. The method is based on the reduction of Cu(II) to Cu(I) with reducing sugars in alkaline medium in the presence of 2,9-dimethyl-1,10-phenanthroline (neocuproine:...
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