Current Research Information SysTem In Norway
 
 

 Norsk versjon


 
Mainpage
Research results/NVI
Researchers
Projects
Research units
Log in
About Cristin
 
 
   
Back to search     Short format     Full format    
Export to


Showing results 1-50 of 115 << Previous 1 2 3    Next >>

2020
1 Lerum, Hans Vigeland; Sand, Svetlana; Eriksen, Dag Øistein; Wibetoe, Grethe; Omtvedt, Jon Petter.
Comparison of single‑phase and two‑phase measurements in extraction, separation and back‑extraction of Cd, Zn and Co from a multi‑element matrix using Aliquat 336. Journal of Radioanalytical and Nuclear Chemistry 2020 ;Volume 324. p. 1203-1214
UiO Untitled
 
2 Nguyen, Viet Hung; Ramzan, Muhammad; Kifle, Dejene; Wibetoe, Grethe.
A simple separation system for elimination of molecular interferences for purity determination of europium and ytterbium oxides by HPLC-ICP-MS. Journal of Analytical Atomic Spectrometry 2020 ;Volume 35.(11) p. 2594-2599
UiO Untitled
 
2018
3 Kessel, Johanne Martine Sætha.
Recovery of Zinc from Municipal Solid Waste Fly Ash. Oslo: Kjemisk Institutt, Universitetet i Oslo 2018 76 p.
UiO Untitled
 
4 Lerum, Hans V.; Sand, Svetlana; Eriksen, Dag Øistein; Hansen, Eddy Walther; Wibetoe, Grethe; Omtvedt, Jon Petter.
Determination of Distribution Ratios in Liquid-liquid Extraction of Hydrometallurgical Process Solutions using ICP-MS and Radiotracer Techniques. foredrag; 2018-08-26 - 2018-08-29
UiO Untitled
 
5 Lerum, Hans Vigeland; Andersen, Niels Højmark; Eriksen, Dag Øistein; Hansen, Eddy Walther; Petersen, Dirk; Wibetoe, Grethe; Omtvedt, Jon Petter.
Study of Cadmium Extraction with Aliquat 336 from Highly Saline Solutions. Journal of Solution Chemistry 2018 ;Volume 47.(8) p. 1395-1417
UiO Untitled
 
6 Mohr, Christian Wilhelm; Vogt, Rolf David; Wibetoe, Grethe; Andersen, Tom.
Rollen til Naturlig organisk materiale og fosfor i et miljø i endring. Tømte symposiet; 2018-04-08 - 2018-11-08
UiO Untitled
 
2017
7 Mohr, Christian Wilhelm.
The Role of Natural Organic Matter and Phosphorus in a Changing Environment. Oslo, Norway: DUO, University of Oslo 2017 136 p.
UiO Untitled
 
8 Ramzan, Muhammad; Kifle, Dejene; Wibetoe, Grethe.
A rapid impregnation method for loading desired amounts of extractant on prepacked reversed-phase columns for high performance liquid chromatographic separation of metal ions. Journal of Chromatography A 2017 ;Volume 1500. p. 76-83
UiO Untitled
 
9 Ræstad, Svein Harald.
Investigation of Leaching of Rare Earth Elements from Phosphate Rock with Nitric Acid using Neutron Activation. : Universitetet i Oslo 2017
UiO Untitled
 
10 Varonina, Sviatlana.
Determination of REEs, Th, and U in Seawater after Off-Line SPE by ICP-MS. : Universitetet i Oslo 2017
UiO Untitled
 
2016
11 Lerum, Hans Vigeland; Bouzga, Aud Mjærum; Jørgensen, Sissel; Petersen, Dirk; Eriksen, Dag Øistein; Hansen, Eddy Walther; Omtvedt, Jon Petter; Wibetoe, Grethe.
LIQUID-LIQUID EXTRACTION OF CADMIUM CHLORIDE COMPLEXES STUDIED BY NMR. XXVIII International Mineral Processing Congress; 2016-09-11 - 2016-09-15
SINTEF UiO Untitled
 
12 Lerum, Hans Vigeland; Bouzga, Aud Mjærum; Jørgensen, Sissel; Petersen, Dirk; Eriksen, Dag Øistein; Hansen, Eddy Walther; Omtvedt, Jon Petter; Wibetoe, Grethe.
Study of cadmium extraction from aqueous solutions with high chloride concentration using radiotracer and NMR. NINTH INTERNATIONAL CONFERENCE ON NUCLEAR AND RADIOCHEMISTRY – NRC9; 2016-08-29 - 2016-09-02
SINTEF UiO Untitled
 
13 Ramzan, Muhammad; Kifle, Dejene; Wibetoe, Grethe.
Comparative study of stationary phases impregnated with acidic organophosphorus extractants for HPLC separation of rare earth elements. Separation science and technology (Print) 2016 ;Volume 51.(3) p. 494-501
UiO Untitled
 
2015
14 Vogt, Rolf David; An, Wei; Andersen, Tom; Bin, Zhou; Deng, Xiaowen; Jiahua, Pan; Johnsen, Rigmor Kristin; Lu, Xueqiang; Luo, Jing; Meng, Li; Ming, Su; Mohr, Christian Wilhelm; Naustdalslid, Jon; Orderud, Geir; Peng, Qimin; Røyset, Oddvar; Tian, Binghui; Tominaga, Koji; Wang, Ting; Wibetoe, Grethe; Yang, Min.
SinoTropia - Watershed Eutropication management in China through system oriented process modelling of pressures, impacts and abatement measures. SinoTropia Final conference; 2015-03-24 - 2015-03-25
OSLOMET UiO NMBU Untitled
 
2014
15 Joshi, Bishnu Prasad.
Assessment of phosphorus loss risk from soil - a case study from Yuqiao reservoir local watershed in north China. : Universitetet i Oslo 2014 95 p.
UiO Untitled
 
16 Nguyen, Viet Hung; Kifle, Dejene; Wibetoe, Grethe.
Elimination of molecular interferences when using QP-ICP-MS: Determination of fifteen rare Earth elements in europium- and ytterbium matrices utilizing ICP-MS and HPLC-ICP-MS. 7th Nordic Conference on Plasma Spectrochemistry; 2014-06-01 - 2014-06-04
UiO Untitled
 
17 Ojwando, Wycliffe Omondi.
Monitoring of phosphorous fractions – Understanding the hydrogeochemical processes governing mobilization and transfer of phosphorous in an agricultural watershed in north-eastern China. DUO: University of Oslo 2014
UiO Untitled
 
18 Pettersen, Ellen.
Soil phosphorus pools and their relation to land-use and soil physiochemical properties – A case study of an agricultural watershed in north-eastern China. DUO: Universitetet i Oslo 2014
UiO Untitled
 
19 Ramzan, Muhammad; Kifle, Dejene; Wibetoe, Grethe.
Separation of lanthanoides on reverse phase columns modified with various ligands: Utilizing ICP-MS as detector. 7th Nordic Conference on Plasma Spectrochemistry; 2014-06-01 - 2014-06-04
UiO Untitled
 
20 Wærsted, Frøydis Meen.
The role of particles and phosphorus bound to particles in eutrophication. DUO: University of Oslo 2014 164 p.
UiO Untitled
 
2013
21 Kifle, Dejene; Sverdrup, Harald; Koca, Deniz; Wibetoe, Grethe.
A Simple Assessment of Global Long Term Supply of the Rare Earth Elements by Using a System Dynamics Model. Environment and Natural Resources Research 2013 ;Volume 3.(1) p. 77-91
UiO Untitled
 
22 Kifle, Dejene; Wibetoe, Grethe.
Retention and elution of precious metals on cyano-modified solid phase microparticle sorbent. Mikrochimica Acta 2013 ;Volume 180.(11-12) p. 981-987
UiO Untitled
 
23 Kifle, Dejene; Wibetoe, Grethe.
Selective liquid chromatographic separation of yttrium from heavier rare earth elements using acetic acid as a novel eluent. Journal of Chromatography A 2013 ;Volume 1307. p. 86-90
UiO Untitled
 
24 Kifle, Dejene.
Separation of rare earth elements and other precious metals by high performance liquid chromatography and solid phase extraction: Development of methodologies for analyses and potential preparative use. : Universitetet i Oslo 2013
SINTEF UiO Untitled
 
25 Kifle, Dejene; Wibetoe, Grethe; Frøseth, Morten; Bigelius, Jonas.
Impregnation and Characterization of High Performance Extraction Columns for Separation of Metal Ions. Solvent extraction and ion exchange 2013 ;Volume 31.(6) p. 668-682
SINTEF UiO Untitled
 
26 Nguyen, Viet Hung.
Development of methods for the determination of rare earth elements as trace impurities in high-purity rare earth oxides and rare earth elements by ICP-MS and HPLC-ICP-MS. Oslo: Kjemisk institutt, Universitetet i Oslo 2013
UiO Untitled
 
27 Wibetoe, Grethe; Kifle, Dejene; Nguyen, Viet Hung.
Bestemmelse av sjeldne jordartsmetaller med ICP-MS. 14: Nordiska användermötet om ICP-MS, ICP-OES, AAS; 2013-11-12 - 2013-11-14
UiO Untitled
 
28 Wærsted, Frøydis Meen; Omtvedt, Jon Petter; Wibetoe, Grethe; Vogt, Rolf David.
The role of particles and phosphorus bound to particles in eutrophication. 14th Nordic-Baltic IHSS symposium 2013; 2013-06-10 - 2013-06-12
UiO Untitled
 
2012
29 Asfaw, Alemayehu; Wibetoe, Grethe; Beauchemin, Diane.
Solid sampling electrothermal vaporization inductively coupled plasma optical emission spectrometry for discrimination of automotive paint samples in forensic analysis. Journal of Analytical Atomic Spectrometry 2012 ;Volume 27.(11) p. 1928-1934
UiO Untitled
 
30 Engelsen, Christian John; Wibetoe, Grethe; Van der Sloot, Hans A; Lund, Walter; Petkovic, Gordana.
Field site leaching from recycled concrete aggregates applied as sub-base material in road construction. Science of the Total Environment 2012 ;Volume 427. p. 86-97
SINTEF UiO Untitled
 
31 Lichtenthaler, Rainer; Wibetoe, Grethe; Røyset, Oddvar.
Flow Scheme for Water Sampling and Analyses. SinoTropia project workshop; 2012-03-28 - 2012-04-01
NIVA UiO Untitled
 
2011
32 Nkoane, Bonang; Lund, Walter; Wibetoe, Grethe; Torto, Nelson.
Studies of metal species in water extracts from metallophytes employing solid phase extraction and size exclusion chromatography coupled to inductively coupled plasma mass spectrometry. Geochemistry: Exploration, Environment, Analysis 2011 ;Volume 11.(3) p. 225-231
UiO Untitled
 
33 Søvik, Marthe-Lise; Larssen, Thorjørn; Vogt, Rolf David; Wibetoe, Grethe; Feng, Xinbin.
Potentially harmful elements in rice paddy fields in mercury hot spots in Guizhou, China. Applied Geochemistry 2011 ;Volume 26.(2) p. 167-173
UiO NIVA Untitled
 
34 Wolle, Mesay Mulugeta; Engelsen, Christian John; Wibetoe, Grethe; Lund, Walter.
Charge-based fractionation of oxyanion-forming metals and metalloids leached from recycled concrete aggregates of different degrees of carbonation: A comparison of laboratory and field leaching tests. Waste Management 2011 ;Volume 31.(2) p. 253-258
UiO SINTEF Untitled
 
2010
35 Engelsen, Christian John; Van der Sloot, Hans A; Wibetoe, Grethe; Justnes, Harald; Lund, Walter; Stoltenberg-Hansson, Erik.
Leaching characterisation and geochemical modelling of minor and trace elements released from recycled concrete aggregates. Cement and Concrete Research 2010 ;Volume 40.(12) p. 1639-1649
UiO SINTEF Untitled
 
36 Nkoane, Bonang; Lund, Walter; Wibetoe, Grethe; Torto, Nelson.
Studies of metal species in water extracts from metallophytes employing solid phase extraction and size exclusion chromatography coupled to inductively coupled plasma mass spectrometry. Geochemistry: Exploration, Environment, Analysis 2010
UiO Untitled
 
37 Wolle, Mesay Mulugeta; Wibetoe, Grethe; Engelsen, Christian John; Lund, Walter.
Optimization of an anion-exchange high performance liquid chromatography-inductively coupled plasma-mass spectrometric method for the speciation analysis of oxyanion-forming metals and metalloids in leachates from cement-based materials. Journal of Chromatography A 2010 ;Volume 1217.(40) p. 6186-6194
UiO SINTEF Untitled
 
38 Wolle, Mesay Mulugeta; Wibetoe, Grethe; Engelsen, Christian John; Lund, Walter.
Overcoming matrix interferences in ion-exchange solid phase extraction of As, Cr, Mo, Sb, Se and V species from leachates of cement-based materials using multiple extractions. Talanta: The International Journal of Pure and Applied Analytical Chemistry 2010 ;Volume 82.(1) p. 158-163
UiO SINTEF Untitled
 
39 Wolle, Mesay Mulugeta; Wibetoe, Grethe; Engelsen, Christian John; Lund, Walter.
Speciation analysis of As, Sb and Se in leachates of cementitious construction materials using selective solid phase extraction and ICP-MS. Journal of Analytical Atomic Spectrometry 2010 ;Volume 25.(2) p. 169-177
UiO SINTEF Untitled
 
40 Wolle, Mesay Mulugeta.
Fractionation and speciation analyses of oxyanion-forming metals and metalloids in leachates from cement-based materials: Optimization and application of analytical methodologies. : Universitetet i Oslo 2010
SINTEF UiO Untitled
 
2009
41 Engelsen, Christian J.; Van der Sloot, Hans A; Wibetoe, Grethe; Petkovic, Gordana; Stoltenberg-Hansson, Erik; Lund, Walter.
Release of major elements from recycled concrete aggregates and geochemical modelling. Cement and Concrete Research 2009 ;Volume 39.(5) p. 446-459
UiO SINTEF Untitled
 
42 Asfaw, Alemayehu; Wibetoe, Grethe.
Potential of Solid Sampling Electrothermal Vaporization for solving spectral interference in Inductively Coupled Plasma Optical Emission Spectrometry. Spectrochimica Acta Part B - Atomic Spectroscopy 2009 ;Volume 64.(5) p. 363-368
UiO Untitled
 
43 Mulugeta, Mesay; Engelsen, Christian John; Wibetoe, Grethe; Lund, Walter.
Evaluation of the distribution of Cr and Mo species in leachates from recycled concretes applied in road constructions. WASCON 2009 7th International Conference on the Environmental and Technical Implications of Constructions with Alternative Materials; 2009-06-03 - 2009-06-05
SINTEF UiO Untitled
 
44 Wibetoe, Grethe.
Akkreditering knyttet til ICP-OES og ICP-MS. ICP-OES og ICP-MS; utvikling, anvendelse og akkreditering; 2009-10-15
UiO Untitled
 
45 Wolle, Mesay Mulugeta; Wibetoe, Grethe; Engelsen, Christian John; Lund, Walter.
Fractionation analysis of oxyanion-forming metals and metalloids in leachates of cement-based materials using ion exchange solid phase extraction. Talanta: The International Journal of Pure and Applied Analytical Chemistry 2009 ;Volume 78.(3) p. 736-742
UiO SINTEF Untitled
 
46 Wolle, Mesay; Wibetoe, Grethe; Engelsen, Christian John; Asfaw, Alemayehu.
Multivariate optimization and simultaneous determination of hydride and non-hydride-forming elements in samples of a wide pH range using dual-mode sample introduction with plasma techniques: application on leachates from cement mortar material. Analytical and Bioanalytical Chemistry 2009 ;Volume 393.(3) p. 1015-1024
UiO SINTEF Untitled
 
47 Xie, Ruikai; McLeod, Cameron W.; Seip, Hans Martin; Jackson, Kevin A.; Wibetoe, Grethe; Schofield, MJ; Anderson, D; Hanssen, JE.
Characteristics of water-soluble inorganic chemical components in size-resolved airborne particulate matters - Sheffield, UK. Journal of Environmental Monitoring 2009 ;Volume 11.(2) p. 336-343
UiO Untitled
 
2008
48 Mogopodi, D; Mosetlha, K; Torto, N; Wibetoe, Grethe.
Accumulation patterns of Cu and Ni for Indigofera melanadenia and Tephrosia longipes plant species growing in Cu-Ni mining area in Botswana. Journal of Geochemical Exploration 2008 ;Volume 97. p. 21-28
UiO Untitled
 
49 Mulugeta, Mesay; Wibetoe, Grethe; Engelsen, Christian John; Lund, Walter.
Based on ion-exchange solid phase extraction: Environmental monitoring of trace elements. Kjemi 2008 (7) p. 6-8
UiO SINTEF Untitled
 
50 Mulugeta, Mesay; Wibetoe, Grethe; Engelsen, Christian John; Lund, Walter.
Fractionation analysis of trace elements in leachates of cement-based materials using ion exchange sorbents over a wide pH range. 4th Nordic Conference in Plasma Spectrochemistry; 2008-06-15 - 2008-06-18
SINTEF UiO Untitled
 
    Show next list