Optoacoustic determination of analytical parameters and physicochemical constants in highly concentrated solutions of chromophores
作者： Kristina V. Lobko , Mikhail A. Shishkin , Tatyana A. Filimonova , Dmitry S. Volkov , Ivan M. Pelivanov
DOI: 10.1016/J.TALANTA.2017.06.001
关键词: Chemistry 、 Dilution 、 Sample preparation 、 Analytical chemistry 、 Fuchsine 、 Reaction rate constant 、 Chromophore 、 Chelation 、 Phenol red 、 Solubility
摘要: Abstract Determination of chromophores various classes—rosaniline (fuchsine), cyanidin-3-O-glucoside, tris(1,10-phenanthroline) iron(II), and phenol red — in their concentrated solutions near solubility limits is performed with the optoacoustic technique for optically dense solutions; light-absorption coefficients samples range from 0.5 to 500 cm–1. The assessment these substances organo-aqueous organic solvents possible up ca. 0.1 mol L–1. Characteristic stability rate constants chelation iron(II) 1,10-phenanthroline are determined. It was found that turbidities 200 FTU dynamic viscosities 20 mPa s do not affect determination. determination total anthocyanins (as cyanidin-3-O-glucoside) bilberry sweet-cherry juices agrees reference spectrophotometric method demonstrates possibilities analysis real without dilution almost no sample preparation.
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