Vanadium-Containing Anionic Chelate for Spectrophotometric Determination of Hydroxyzine Hydrochloride in Pharmaceuticals [PDF]
Molecules, 2023 Four azo dyes known to form anionic complexes with V(V) were investigated as potential liquid–liquid extraction–spectrophotometric reagents for the antihistamine medication hydroxyzine hydrochloride (HZH).
Gergana Kirilova Kirova +3 more
doaj +2 more sources
Extractive Spectrophotometric Determination and Theoretical Investigations of Two New Vanadium(V) Complexes [PDF]
Molecules, 2023 Two new vanadium (V) complexes involving 6-hexyl-4-(2-thiazolylazo)resorcinol (HTAR) and tetrazolium cation were studied. The following commercially available tetrazolium salts were used as the cation source: tetrazolium red (2,3,5-triphenyltetrazol-2 ...
Kiril B. Gavazov +4 more
doaj +2 more sources
Use of a Hydrophobic Azo Dye for the Centrifuge-Less Cloud Point Extraction–Spectrophotometric Determination of Cobalt [PDF]
Molecules, 2022 The hydrophobic azo dye 6-hexyl-4-(2-thiazolylazo)resorcinol (HTAR, H2L) was studied as part of a system for the centrifuge-less cloud point extraction (CL-CPE) and spectrophotometric determination of traces of cobalt. The extracted 1:2 (Co:HTAR) complex,
Kiril Blazhev Gavazov +6 more
doaj +2 more sources
Mono- and Binuclear Complexes in a Centrifuge-Less Cloud-Point Extraction System for the Spectrophotometric Determination of Zinc(II) [PDF]
MoleculesThe hydrophobic reagent 6-hexyl-4-(2-thiazolylazo)resorcinol (HTAR) was investigated as part of a cloud-point extraction (CPE) system for the spectrophotometric determination of Zn(II). In the system, complexes with different stoichiometries, including 1:
Kiril B. Gavazov +4 more
doaj +2 more sources
Extraction-Chromogenic Systems for Vanadium(V) Based on Azo Dyes and Xylometazoline Hydrochloride
Acta Chimica Slovenica, 2019 Liquid-liquid extraction-chromogenic systems for vanadium(V) based on xylometazoline hydrochloride (XMZ) and azo derivatives of resorcinol (ADRs) were studied.
Danail Georgiev Hristov +2 more
doaj +1 more source
Centrifuge-Less Mixed Micelle-Mediated Cloud Point Extraction-Spectrophotometric Determination of Vanadium Using 4-Nitrocatechol and Cetylpyridinium Chloride. [PDF]
Int J Mol SciGajdošová A +6 more
europepmc +1 more source
Ionic Liquid-Based Centrifuge-Less Cloud Point Extraction of a Copper(II)-4-Nitrocatechol Complex and Its Analytical Application. [PDF]
MoleculesKiradzhiyska D +5 more
europepmc +1 more source
A simple, cheap, and environmentally friendly centrifuge-less cloud point extraction procedure was developed for the preconcentration of traces of Cu(II) before its spectrophotometric determination. It is based on a complexation reaction with the hydrophobic azo reagent 6-hexyl-4-(2-thiazolylazo)resorcinol (HTAR), in which a complex with a ...
Kiril Gavazov +2 more
exaly +4 more sources