Results 261 to 270 of about 28,704 (278)

Determination of conditional stability constants of cadmium-humic acid complexes in freshwater by use of a competitive ligand equilibration-solvent extraction technique

Environmental Toxicology and Chemistry, 2000
Abstract A technique for determining organic complexation of cadmium in freshwater using competitive ligand equilibration coupled with solvent extraction was evaluated. The method involves a competitive equilibration of the sample with potassium iodide and pyridine followed by extraction of the mixed cadmium-iodide-pyridine complex into ...
van Ginneken, L., Blust, R.
openaire   +2 more sources

The Influence of Alkyl Chain Length and Steric Effect on the Stability Constants and Extractability of Co(II) Complexes with 1-Alkyl-2-Methylimidazoles

Separation Science and Technology, 2014
Using the liquid-liquid partition method, the formation of Co(II) complexes with 1-alkyl-2-methylimidazoles (where alkyl = C4H9 trough C12H25) at 25°C and at a fixed ionic strength of the aqueous phase (I = 0.5, (HL)NO3, KNO3) were studied. Dichloromethane, trichloromethane, and 2-ethylhexanol were used as diluents.
Elzbieta Radzyminska-Lenarcik, Katarzyna Witt   +1 more
openaire   +1 more source

Trace Metal Complexation by Fulvic Acid Extracted from Sewage Sludge: I. Determination of Stability Constants and Linear Correlation Analysis

Soil Science Society of America Journal, 1981
Abstract The complexes formed between either Cd 2+ or Pb 2+ and fulvic acid extracted from sewage sludge mixtures were investigated by potentiometric titration of K/H fulvate with either Cd(ClO 4
Garrison Sposito, K. M. Holtzclaw, C. S. LeVesque‐Madore   +2 more
openaire   +1 more source

The Influence of the Alkyl Chain Length and Steric Effect on Stability Constants and Extractability of Co(II) Complexes with 1‐Alkyl‐4(5)‐methylimidazoles

Separation Science and Technology, 2006
Abstract Extraction of Co(II) complexes has been studied with nine derivatives of 1‐alkyl‐4(5)‐methylimidazoles (with R=C2H3 to C10H21) from aqueous solution [I=0.5(KNO3) at 25°C] with toluene, trichloromethane, and 2‐ethyl‐1‐hexanol. Stability constants of the complexes formed in the aqueous phase (β c ) as well as partition constants (P c ) of the ...
Beniamin Lenarcik, Piotr Ojczenasz, Andrzej Kopkowski   +2 more
openaire   +1 more source

Stability constants and free energies of complexation of metal-ion cryptates in nitromethane. Derived parameters for the extraction of cations by cryptand 222 from water to pure nitromethane

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1985
Stability constants have been measured and free energies of complexation of alkali-metal and silver cations in nitromethane at 298 K have been derived. The results obtained in this solvent are compared with corresponding data in different reaction media. Free energies of transfer of metal-ion cryptates from water to nitromethane are derived.
Angela F. Danil de Namor, Lily Ghousseini, Walter H. Lee   +2 more
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ChemInform Abstract: Determination of Stability Constants of Nonextractable Complexes by Solvent Extraction Method

Chemischer Informationsdienst, 1986
M. SUDERSANAN, A. K. SUNDARAM
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Determination of Stability Constants of Some Chelate Complexes of Lanthanide Ions with Quadridentate Aromatic Schiff Bases by an Extraction Method

Zeitschrift für Physikalische Chemie, 1972
M. Rekas, I. Stroński, A. Zieliński
openaire   +1 more source

The determination of stability constants for the chloro complexes of (C2H5)3PbCln1−n in acid solution using an amine extraction technique

Journal of Inorganic and Nuclear Chemistry, 1974
A.J. Barker, A.B. Clarke
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ChemInform Abstract: THE STABILITY CONSTANTS OF NICKEL(II) COMPLEXES WITH CHLORIDE, THIOCYANATE, SULFATE, THIOSULFATE, AND OXALATE IONS, AS DETERMINED BY A SOLVENT EXTRACTION METHOD

Chemischer Informationsdienst, 1976
RYOKICHI MURAI, KIYOSHI KURAKANE, TATSUYA SEKINE   +2 more
openaire   +1 more source

Determination of the activity coefficient of tricaprylmethylammonium chloride and the stability constants of the aqueous complexes formed in the extraction of zinc(II) from hydrochloric acid solutions

Analytica Chimica Acta, 1976
Taichi Sato, Shigeru Murakami
openaire   +1 more source