Results 11 to 20 of about 132 (112)

Extraction-Chromogenic System for Nickel(II) Based on 5-methyl-4-(2-thiazolylazo)resorcinol and Aliquat 336

Acta Chimica Slovenica, 2020
A water-isobutanol extraction-chromogenic system for NiII, based on the azo dye 5-methyl-4-(2-thiazolylazo)resorcinol (MTAR; H2L) and the ionic liquid Aliquat 336 (A336), was studied. Under the optimal conditions (cMTAR = 2.0 × 10–4 mol dm–3, cA336 = 5.6
Galya Konstantinova Toncheva, Danail Georgiev Hristov, Nikolina Petkova Milcheva, Kiril Blazhev Gavazov   +3 more
doaj   +1 more source

Synthesis and Biological Activity of Dysprosium Lanthanide Complex with Azo Ligand

Diyala Journal of Medicine, 2023
Background: The present study describes complex reaction between 4-(2-Thiazolylazo)resorcinol (TAR) and Dy(III) metal ion. The TAR compound is known to form coloured chelates with various  lanthanide metal ions .
Kamaran Basheer Hussein , , Sangar Sabah Sabir   +1 more
doaj   +1 more source

Iron Speciation in Fram Strait and Over the Northeast Greenland Shelf: An Inter-Comparison Study of Voltammetric Methods

Frontiers in Marine Science, 2021
Competitive ligand exchange – adsorptive cathodic stripping voltammetry (CLE-AdCSV) is a widely used technique to determine dissolved iron (Fe) speciation in seawater, and involves competition for Fe of a known added ligand (AL) with natural organic ...
Indah Ardiningsih, Kechen Zhu, Pablo Lodeiro, Martha Gledhill, Gert-Jan Reichart, Gert-Jan Reichart, Eric P. Achterberg, Rob Middag, Loes J. A. Gerringa   +8 more
doaj   +1 more source

On-line determination of the trace amount of cobalt(II) in real samples by flame atomic absorption spectrometry method after pre-concentration by modified polyvinyl chloride

SN Applied Sciences, 2023
This work reports a simple and sensitive on-line solid-phase extraction system for the pre-concentration and determination of a trace amount of Co(II (ions by flame atomic absorption spectrometry (FAAS).
Tahere Zarnoushe Farahani, Ghadamali Bagherian, Mansour Arab Chamjangali, Motahare Ashrafi   +3 more
doaj   +1 more source

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, Nikolina Petkova Milcheva, Kiril Blazhev Gavazov   +2 more
doaj   +1 more source

دراسات طيفية وكهربائية على الليجاند 4-(4-فينيل-2-ثيازوليل أزو)- ريزورسينول ومعقداته مع بعض الايونات الفلزية

مجلة المختار للعلوم, 2011
حُضر مركب 4-(4-فينيل-2-ثيازوليل أزو) ريزورسينول  4-(4`–phenyl–2'– thiazolylazo)–resorcinol   وتم تعيين ثوابت التأين لهذا المركب (الليجاند L) وثوابت التكوين لمعقداته مع ايونات الفلزات Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) بالطريقة الطيفية والجهدية ...
Farid I. El–Dossoki
doaj   +1 more source

A 2:2:2 Complex of Vanadium(V) with 4-(2-Thiazolylazo)orcinol and 2,3,5-Triphenyl-2H-Tetrazolium Chloride

Acta Chimica Slovenica, 2016
The complex formation in the vanadium(V) / 4-(2-thiazolylazo)orcinol (TAO) / 2,3,5-triphenyl-2H-tetrazolium chloride (TTC) liquid-liquid extraction-chromogenic system was studied.
Kiril Blazhev Gavazov, Vassil Borisov Delchev, Kremena Tomova Mileva, Teodora Stefcheva Stefanova, Galya Kostadinova Toncheva   +4 more
doaj   +1 more source

The Crystal and Molecular Structure of 1-(2-Thiazolylazo)-2-naphthol [PDF]

Bulletin of the Chemical Society of Japan, 1976
Abstract The crystal structure of 1-(2-thiazolylazo)-2-naphthol, C13H9N3OS, has been determined from three-dimensional X-ray data collected by counter methods. The crystals are monoclinic with space group P21/a; cell dimensions: a=17.721(1), b=28.366(2), c=4.699(1) Å, β=91.78(1)°, and Z=8.
openaire   +1 more source

Liquid-Liquid Extraction-Chromogenic System for Vanadium(V) Based on 4-(2-thiazolylazo)orcinol (TAO) and Aliquat 336

Acta Chimica Slovenica, 2018
The quaternary ammonium salt Aliquat 336 (A336; R4N+Cl-) and the azo dye 4-(2-thiazolylazo)orcinol (ТАО) were examined as constituents of a water-isobutanol extraction-chromogenic system for vanadium(V).
Galya K. Toncheva, Nikolina P. Milcheva, Kiril Blazhev Gavazov   +2 more
doaj   +1 more source

Contribution to the termodynamics of 1-(2-thiazolylazo)-2-naphthol in the water-nitrobenzene extraction system

Journal of the Serbian Chemical Society, 2000
General relations among thermodynamic parameters characterizing chemical equilibria including species ?2?+, HA, H+ and A- in both phases of a two-phase water-nitrobenzene extraction system have been derived. From the extraction measurements, the equilibrium distribution constant of electroneutral 1-(2-thiazolylazo)-2-naphthol (TAN, HA ...
Makrlik Emanuel, Vaňura Petr
openaire   +3 more sources