Zobrazeno 1 - 10
of 64
pro vyhledávání: '"GRETHE WIBETOE"'
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 324:1203-1214
Cd and Zn were separated from Co, from chloride solutions containing 16 different metal ions. The separation method used was liquid–liquid extraction. Two different chloride concentrations, 0.5 and 5 mol/kg, were tested. Aliquat 336 in toluene was
Publikováno v:
Journal of Analytical Atomic Spectrometry. 35:2594-2599
A simple and rapid HPLC-ICP-MS method for determination of ultra-trace REE impurities in highly pure Eu2O3 and Yb2O3 has been developed. The majority of REEs as trace impurities in both Eu2O3 and Yb2O3 matrices can be determined solely by ICP-MS. How
Autor:
Eddy W. Hansen, Dirk Petersen, Hans Vigeland Lerum, Jon Petter Omtvedt, Grethe Wibetoe, Niels H. Andersen, Dag Øistein Eriksen
Publikováno v:
Journal of Solution Chemistry. 47:1395-1417
A large number of model solutions with high ionic strength were synthesised to mimic industrial conditions and were used as a first approach to study Cd extraction in the presence of chloride at high salinity, as experienced in real industrial soluti
Publikováno v:
Journal of Chromatography A. 1500:76-83
A time-efficient impregnation method for loading extractant onto reversed-phase columns was developed, using di-(2-ethylhexyl) phosphoric acid (HDEHP) as a model extractant. The optimal loading conditions for the impregnation process of a standard an
Publikováno v:
Separation Science and Technology. 51:494-501
Chromatographic separation behavior of rare earth elements (REEs) on reversed-phase columns impregnated with di-(2-ethylhexyl) phosphoric acid (H[DEHP]), 2-ethylhexyl, 2-ethylhexyl phosphonic acid (H[(EH)EHP]) and di-(2,4,4-trimethylpentyl) phosphini
Publikováno v:
Solvent Extraction and Ion Exchange. 31:668-682
Impregnation behaviors of reverse-phase silica materials and C18-silica HPLC columns were studied using di-(2-ethylhexyl)phosphoric acid (HDEHP) as a model extractant. Initially, the adsorption efficiency of the ligand on different types of bulk part
Autor:
Grethe Wibetoe, Dejene Kifle
Publikováno v:
Microchimica Acta. 180:981-987
We report on a study on the retention and elution of ions of the precious metals Au, Ir, Pd, Pt, Rh and Ru, sometimes in the presence of ions of the nonprecious elements Co, Cu, Fe, Ni, Pb and Te. A commercial cyano-modified microparticle-based solid
Publikováno v:
Geochemistry: Exploration, Environment, Analysis. 11:225-231
Metallophytes have the ability to grow in metal-rich soils without showing signs of toxicity. It is believed that chelating of metals to organic ligands is a mechanism that metal-tolerant plants use for detoxification. To obtain information about met
Publikováno v:
Applied Geochemistry. 26:167-173
Levels of the chalcophile metals Hg, Pb, Cd, Cu and Zn and the metalloid As in soils from rice paddy fields were assessed in two regions impacted by different industrial activities in Guizhou province, China. The two study areas (Wanshan and Qingzhen
Autor:
Harald Justnes, Erik Stoltenberg-Hansson, Hans A. van der Sloot, Grethe Wibetoe, Christian J. Engelsen, Walter Lund
Publikováno v:
Cement and Concrete Research. 40:1639-1649
The pH dependent release of Cd, Cr, Cu, Mn, Mo, Ni, Pb, V and Zn from different recycled concrete aggregate samples was determined. Geochemical speciation modelling was applied on the concentrations of Cu, Cr, Mo and Ni in the leachates in order to p