Extraction-Chromogenic Systems for Vanadium(V) Based on Azo Dyes and Xylometazoline Hydrochloride
DOI:
https://doi.org/10.17344/acsi.2019.5244Keywords:
6-Hexyl-4-(2-thiazolylazo)resorcinol, 5-Methyl-4-(2-thiazolylazo)resorcinol, 4-(2-Thiazolylazo)resorcinol, Xylometazoline hydrochloride, Ion-association, Ternary complexAbstract
Liquid-liquid extraction-chromogenic systems for vanadium(V) based on xylometazoline hydrochloride (XMZ) and azo derivatives of resorcinol (ADRs) were studied. The following ADRs were used: 4-(2-thiazolylazo)resorcinol (TAR), 5-methyl-4-(2-thiazolylazo)resorcinol (MTAR), and 6-hexyl-4-(2-thiazolylazo)resorcinol (HTAR). Concentration of the reagents, pH of the aqueous medium and shaking time were subjects of optimization experiments. The chloroform-extracted ternary complexes were of composition 1:1:1. The molar absorptivity coefficients (el), absorption maxima (l), constants of extraction (Log K), and fractions extracted (E%) were found to be e553 = 2.50 ´ 104 dm3 mol–1 cm–1, Log K = 3.5, and E = 96% (ADR = TAR); e550 = 1.88 ´ 104 dm3 mol–1 cm–1, Log K = 3.4, and E = 98% (ADR = MTAR); and e554 = 2.62 ´ 104 dm3 mol–1 cm–1, Log K = 5.0, and E = 99.5% (ADR = HTAR). The Sandell’s sensitivities and Beer’s law limits were determined as well.
Published
Issue
Section
License
Except where otherwise noted, articles in this journal are published under the Creative Commons Attribution 4.0 International License