Екстраціойно-фотометричне визначення диклофенаку із основним барвником

Abstract

We recently found that the cationic diindodicarbocyanine dye (DIDC) could be used for the extractive spectrophotometric determination of diclofenak. The reaction of the complex-formation and extraction of diclofenak ion associates (IA) with DIDC has been studied by means of spectrophotometric method. The influence of acidity, nature and concentration of DIDC, solvents and other factors on the formation and extraction of IA has been investigated. In optimal condition of the formation the composition and the principal chemical-analytical characteristics of IA have been determined. A 1:1 DICL:DIDC ratio was found and the extracted IA corresponded to the general formula [DICL]-R+ (where R+ is an cation of DIDC). High values of the molar absorption coefficients of DICL IA for different extractants found (3,39 – 7,78)·104. The new high-sensitive and selective method of the extractive-photometric determination of diclofenac have been developed.