Grethe Wibetoe

Image of Grethe Wibetoe
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Phone +47-22855516
Room Ø 202
Username
Visiting address Sem Sælands vei 26 None 0371 OSLO
Postal address Postboks 1033 0315 OSLO
Other affiliations Department of Chemistry

Academic Interests

My interest and background are within analytical chemistry with the main focus on method development for determination of metals and metal species needed for environmental research and industrial applications.

Both spectrometric and chromatographic methods are used.

At present we work with the following topics:

  • Studies of separation systems for metal with industrial applications. The purpose may be to recover the precious metal or to remove unwanted metals from minerals, raw materials and process solutions.
  • Development of analytical methodologies for environmental and industrial applications, especially for trace metal determinations and speciation analysis.

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Methods used include

  • Inductively coupled plasma mass spectrometry (ICP-MS)
  • Inductively coupled plasma optical emission spectrometry (ICP-OES)
  • High performance liquid chromatography (HPLC)
  • HPLC-ICPMS

Teaching

At present I lecture the following courses:

 

Tags: Chemistry, Analytical chemistry, Environmental analyses, Hydrometallurgy, Spectrometry, Chromatography, Separation of metals, Inductively coupled plasma mass spectrometry, Inductively coupled plasma optical emission spectrometry, Quality assurance

Publications

  • Ramzan, Muhammad; Kifle, Dejene & Wibetoe, Grethe (2017). 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.  ISSN 0021-9673.  1500, s 76- 83 . doi: 10.1016/j.chroma.2017.04.005
  • Ramzan, Muhammad; Kifle, Dejene & Wibetoe, Grethe (2016). Comparative study of stationary phases impregnated with acidic organophosphorus extractants for HPLC separation of rare earth elements. Separation science and technology (Print).  ISSN 0149-6395.  51(3), s 494- 501 . doi: 10.1080/01496395.2015.1112400
  • Kifle, Dejene; Sverdrup, Harald; Koca, Deniz & Wibetoe, Grethe (2013). A Simple Assessment of Global Long Term Supply of the Rare Earth Elements by Using a System Dynamics Model. Environment and Natural Resources Research.  ISSN 1927-0488.  3(1), s 77- 91
  • Kifle, Dejene & Wibetoe, Grethe (2013). Retention and elution of precious metals on cyano-modified solid phase microparticle sorbent. Mikrochimica Acta.  ISSN 0026-3672.  180(11-12), s 981- 987 . doi: 10.1007/s00604-013-1019-2
  • Kifle, Dejene & Wibetoe, Grethe (2013). Selective liquid chromatographic separation of yttrium from heavier rare earth elements using acetic acid as a novel eluent. Journal of Chromatography A.  ISSN 0021-9673.  1307, s 86- 90 . doi: 10.1016/j.chroma.2013.07.070
  • Kifle, Dejene; Wibetoe, Grethe; Frøseth, Morten & Bigelius, Jonas (2013). Impregnation and Characterization of High Performance Extraction Columns for Separation of Metal Ions. Solvent extraction and ion exchange.  ISSN 0736-6299.  31(6), s 668- 682 . doi: 10.1080/07366299.2013.806737
  • Asfaw, Alemayehu; Wibetoe, Grethe & Beauchemin, Diane (2012). Solid sampling electrothermal vaporization inductively coupled plasma optical emission spectrometry for discrimination of automotive paint samples in forensic analysis. Journal of Analytical Atomic Spectrometry.  ISSN 0267-9477.  27(11), s 1928- 1934 . doi: 10.1039/c2ja30193h
  • Engelsen, Christian John; Wibetoe, Grethe; Van der Sloot, Hans A; Lund, Walter & Petkovic, Gordana (2012). Field site leaching from recycled concrete aggregates applied as sub-base material in road construction. Science of the Total Environment.  ISSN 0048-9697.  427, s 86- 97 . doi: 10.1016/j.scitotenv.2012.04.021
  • Nkoane, Bonang; Lund, Walter; Wibetoe, Grethe & Torto, Nelson (2011). 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.  ISSN 1467-7873.  11(3), s 225- 231 . doi: 10.1144/1467-7873/10-031
  • Søvik, Marthe-Lise; Larssen, Thorjørn; Vogt, Rolf David; Wibetoe, Grethe & Feng, Xinbin (2011). Potentially harmful elements in rice paddy fields in mercury hot spots in Guizhou, China . Applied Geochemistry.  ISSN 0883-2927.  26(2), s 167- 173 . doi: 10.1016/j.apgeochem.2010.11.015
  • Wolle, Mesay Mulugeta; Engelsen, Christian John; Wibetoe, Grethe & Lund, Walter (2011). 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.  ISSN 0956-053X.  31(2), s 253- 258 . doi: 10.1016/j.wasman.2010.05.003
  • Engelsen, Christian John; Van der Sloot, Hans A; Wibetoe, Grethe; Justnes, Harald; Lund, Walter & Stoltenberg-Hansson, Erik (2010). Leaching characterisation and geochemical modelling of minor and trace elements released from recycled concrete aggregates. Cement and Concrete Research.  ISSN 0008-8846.  40(12), s 1639- 1649 . doi: 10.1016/j.cemconres.2010.08.001
  • Nkoane, Bonang; Lund, Walter; Wibetoe, Grethe & Torto, Nelson (2010). 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.  ISSN 1467-7873.
  • Wolle, Mesay Mulugeta; Wibetoe, Grethe; Engelsen, Christian John & Lund, Walter (2010). 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.  ISSN 0021-9673.  1217(40), s 6186- 6194 . doi: 10.1016/j.chroma.2010.07.082
  • Wolle, Mesay Mulugeta; Wibetoe, Grethe; Engelsen, Christian John & Lund, Walter (2010). 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.  ISSN 0039-9140.  82(1), s 158- 163 . doi: 10.1016/j.talanta.2010.04.013
  • Wolle, Mesay Mulugeta; Wibetoe, Grethe; Engelsen, Christian John & Lund, Walter (2010). 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.  ISSN 0267-9477.  25(2), s 169- 177 . doi: 10.1039/b919994m
  • Engelsen, Christian J.; Van der Sloot, Hans A; Wibetoe, Grethe; Petkovic, Gordana; Stoltenberg-Hansson, Erik & Lund, Walter (2009). Release of major elements from recycled concrete aggregates and geochemical modelling. Cement and Concrete Research.  ISSN 0008-8846.  39(5), s 446- 459 . doi: 10.1016/j.cemconres.2009.02.001
  • Asfaw, Alemayehu & Wibetoe, Grethe (2009). Potential of Solid Sampling Electrothermal Vaporization for solving spectral interference in Inductively Coupled Plasma Optical Emission Spectrometry. Spectrochimica Acta Part B - Atomic Spectroscopy.  ISSN 0584-8547.  64(5), s 363- 368 . doi: 10.1016/j.sab.2009.04.002
  • Wolle, Mesay Mulugeta; Wibetoe, Grethe; Engelsen, Christian John & Lund, Walter (2009). 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.  ISSN 0039-9140.  78(3), s 736- 742 . doi: 10.1016/j.talanta.2008.12.036
  • Wolle, Mesay; Wibetoe, Grethe; Engelsen, Christian John & Asfaw, Alemayehu (2009). 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.  ISSN 1618-2642.  393(3), s 1015- 1024 . doi: 10.1007/s00216-008-2494-x
  • Xie, Ruikai; McLeod, Cameron W.; Seip, Hans Martin; Jackson, Kevin A.; Wibetoe, Grethe; Schofield, MJ; Anderson, D & Hanssen, JE (2009). Characteristics of water-soluble inorganic chemical components in size-resolved airborne particulate matters - Sheffield, UK. Journal of Environmental Monitoring.  ISSN 1464-0325.  11(2), s 336- 343 . doi: 10.1039/b805285a
  • Mogopodi, D; Mosetlha, K; Torto, N & Wibetoe, Grethe (2008). 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.  ISSN 0375-6742.  97, s 21- 28 . doi: 10.1016/j.gexplo.2007.09.002
  • Mosetlha, Kabo; Torto, Nelson & Wibetoe, Grethe (2007). Determination of Cu and Ni in plant slurry by microdialysis sampling: Comparison of dialyzable fractions with total metal content. Talanta: The International Journal of Pure and Applied Analytical Chemistry.  ISSN 0039-9140.  71, s 766- 770 . doi: 10.1016/j.talanta.2006.05.020
  • Nkoane, Bonang B M; Wibetoe, Grethe; Lund, Walter; Abegaz, Berhanu M & Torto, Nelson (2007). Examination of Blepharis aspera as a possible Cu-Ni indicator plant. South African Journal of Science.  ISSN 0038-2353.  103(9&10), s 363- 364
  • Nkoane, Bonang; Wibetoe, Grethe; Lund, Walter & Torto, Nelson (2007). A multi-element study of metallophytes from mineralized areas in Botswana using ICP-AES and ICP-MS. Geochemistry: Exploration, Environment, Analysis.  ISSN 1467-7873.  7, s 49- 56
  • Zike, Alemayehu Asfaw & Wibetoe, Grethe (2007). A new demountable hydrofluoric acid resistant triple mode sample introduction system for ICP-AES and ICP-MS. Journal of Analytical Atomic Spectrometry.  ISSN 0267-9477.  22, s 158- 163 . doi: 10.1039/b609531c
  • Aspmo, Katrine; Temme, Christian; Berg, Torunn; Ferrari, Christophe; Gauchard, Pierre-Alexis; Fain, Xaviar & Wibetoe, Grethe (2006). Mercury in the Atmosphere, Snow and Melt Water Ponds in the North Atlantic Ocean during Arctic Summer. Environmental Science and Technology.  ISSN 0013-936X.  40, s 4083- 4089
  • Asfaw, Alemayehu & Wibetoe, Grethe (2006). Dual mode sample introduction for multi-element determination by ICP-MS: the optimization and use of a method based on simultaneous introduction of vapor formed by NaBH4 reaction and aerosol from the nebulizer. Journal of Analytical Atomic Spectrometry.  ISSN 0267-9477.  21, s 1027- 1035
  • Mosetlha, K; Torto, N & Wibetoe, Grethe (2006). Enhancing the microdialysis recovery for sampling of Cu and Ni by incorporating humic acid in the perfusion liquid. Analytica Chimica Acta.  ISSN 0003-2670.  562, s 158- 163
  • Petrov, Panayot Kostov; Wibetoe, Grethe & Tsalev, Dimiter (2006). Comparison between hydride generation and nebulization for sample introduction in the determination of lead in plants and water samples by inductively coupled plasma mass spectrometry, using external calibration and isotope dilution. Spectrochimica Acta Part B - Atomic Spectroscopy.  ISSN 0584-8547.  61, s 50- 57
  • Xie, Rui Kai; Seip, Hans Martin; Wibetoe, Grethe; Nori, Showan & McLeod, Cameron William (2006). Heavy Coal Combustion as the dominant source of particulate pollution in Taiyuan, China, corroborated by high concentrations of arsenic and selenium in PM10. Science of the Total Environment.  ISSN 0048-9697.  370, s 409- 415
  • Alemayehu, Asfaw & Wibetoe, Grethe (2005). Direct analysis of beer by ICP-AES: A very simple method for determination of Cu, Mn and Fe. Mikrochimica Acta.  ISSN 0026-3672.  152, s 61- 68
  • Aspmo, Katrine; Berg, Torunn & Wibetoe, Grethe (2005). Opphopning av kvikksøv i Arktis. Kjemi.  ISSN 0023-1983.  5, s 6- 9
  • Aspmo, Katrine; Gauchard, Pierre-Alexis; Steffen, Alexandra; Temme, Christian; Berg, Torunn; Bahlmann, Enno; Banic, Cathy; Dommergue, Aurelien; Ebinghaus, Ralf; Ferrari, Christophe; Pirrone, Nicola; Sprovieri, Francesca & Wibetoe, Grethe (2005). Measurements of atmospeheric mercury species during an international study of mercury depletion events at Ny-Ålesund, Svalbard, spring 2003.How reproducible are our present method?. Atmospheric Environment.  ISSN 1352-2310.  39, s 7607- 7619
  • Nkoane, Bonang; Sawula, Gerald; Wibetoe, Grethe & Lund, Walter (2005). Identification of potential new Cu and Ni indicator plants from mineralized locations in Botswana. Journal of Geochemical Exploration.  ISSN 0375-6742.  86, s 130- 142
  • Alemayehu, Asfaw & Wibetoe, Grethe (2005). Simultaneous determination of hydride (Se) and non-hydride-forming (Ca, Mg, K, P, S and Zn) elements in various beverages (beer, coffee, and milk), with minimum sample preparation, by ICP-AES and use of a dual-mode sample-introduction system. Analytical and Bioanalytical Chemistry.  ISSN 1618-2642.  382, s 173- 179
  • Asfaw, Alemayehu & Wibetoe, Grethe (2004). Freon (CHF3)-assisted atomization for the determination of titanium using ultrasonic slurry sampling-graphite furnace atomic absorption spectrometry (USS-GFAAS): a simple and advantageous method for solid samples. Analytical and Bioanalytical Chemistry.  ISSN 1618-2642.  379, s 526- 531
  • Berg, Torunn; Sekkesæter, Siri; Steinnes, Eiliv; Valdal, Anne-Kari & Wibetoe, Grethe (2003). Springtime depletion of mercury in the European Artic as observed at Svalbard. Science of the Total Environment.  ISSN 0048-9697.  304, s 43- 51
  • Sørlie, Torunn Marie & Wibetoe, Grethe (2003). Determination of titanium by slurry sampling graphite furnace atomic absortion spectrometry with the use of fluoride modifiers. Analytical and Bioanalytical Chemistry.  ISSN 1618-2642.  376, s 721- 727
  • Langødegård, Marit & Wibetoe, Grethe (2002). Determination of gallium in soil by slurry sampling graphite furnace atomic absorption spectrometry. Analytical and Bioanalytical Chemistry.  ISSN 1618-2642.  373, s 820- 826
  • Lilleengen, Beate & Wibetoe, Grethe (2002). Graphite furnace atomic absorption spectrometry used for determination of total, EDTA and acetic acid extractable content of chromium and cobalt in soils. Analytical and Bioanalytical Chemistry.  ISSN 1618-2642.  372, s 187- 195
  • Maurice, Jan Frode; Wibetoe, Grethe & Sjåstad, Knut-Endre (2002). Longitudinal distribution of thallium in human scalp hair determined by isotope dilution electrothermal vaporization inductively coupled plasma mass spectrometry. Journal of Analytical Atomic Spectrometry.  ISSN 0267-9477.  17(5), s 485- 490
  • Engelsen, Christian John & Wibetoe, Grethe (2000). Determination of Al, Cu, Li and Mn in spruce seeds and plant reference materials by slurry sampling electrothermal atomic absorption spectrometry. Fresenius' Journal of Analytical Chemistry.  ISSN 0937-0633.  366, s 494- 503
  • Wibetoe, Grethe; Lund, Walter; Takuwa, David & Sawula, Gerald (1999). Coulter particle analysis used for studying the effect of sample treatment in ultrasonic slurry sampling electrothermal atomic absorption spectrometry. Fresenius' Journal of Analytical Chemistry.  ISSN 0937-0633.  363, s 46- 54
  • Buseth, Erik; Wibetoe, Grethe & Martinsen, Ivar (1998). Determination of endogenous concentrations of the lanthanides in body fluids and tissues using electrothermal vaporization inductively coupled plasma mass spectrometry. Journal of Analytical Atomic Spectrometry.  ISSN 0267-9477.  13, s 1039- 1049
  • Takuwa, David; Sawula, Gerald; Wibetoe, Grethe & Lund, Walter (1997). Determination of Cobalt, Nickel and Copper in Flowers, Leaves, Stem and Roots of Plants using Ultrasonic Slurry Sampling Electrothermal Atomic Absorption Spectrometry. Journal of Analytical Atomic Spectrometry.  ISSN 0267-9477.  12, s 849- 854
  • Wifladt, Anne Marie; Wibetoe, Grethe & Lund, Walter (1997). Determination of antimony in wine by hydride generation graphite furnace atomic absorption spectrometry. Fresenius' Journal of Analytical Chemistry.  ISSN 0937-0633.  357, s 92- 96
  • Knutsen, Einar & Wibetoe, Grethe (1995). Determination of elevated levels of Dysprosium in Serum by Electrothermal Atomic Absorption Spectrometry. Journal of Analytical Atomic Spectrometry.  ISSN 0267-9477.  10, s 757- 761
  • Wibetoe, Grethe & Langmyhr, Finn J. (1987). Interferences in invers Zeeman-corrected atomic absoption spectrometry caused by Zeeman splitting of molecules. Analytica Chimica Acta.  ISSN 0003-2670.  198, s 81- 86

View all works in Cristin

  • Mohr, Christian Wilhelm; Vogt, Rolf David; Andersen, Tom & Wibetoe, Grethe (2017). The Role of Natural Organic Matter and Phosphorus in a Changing Environment .
  • Lerum, Hans Vigeland; Bouzga, Aud Mjærum; Jørgensen, Sissel; Petersen, Dirk; Eriksen, Dag Øistein; Hansen, Eddy Walther; Omtvedt, Jon Petter & Wibetoe, Grethe (2016). LIQUID-LIQUID EXTRACTION OF CADMIUM CHLORIDE COMPLEXES STUDIED BY NMR.
  • Lerum, Hans Vigeland; Bouzga, Aud Mjærum; Jørgensen, Sissel; Petersen, Dirk; Eriksen, Dag Øistein; Hansen, Eddy Walther; Omtvedt, Jon Petter & Wibetoe, Grethe (2016). Study of cadmium extraction from aqueous solutions with high chloride concentration using radiotracer and NMR.
  • 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 (2015). SinoTropia - Watershed Eutropication management in China through system oriented process modelling of pressures, impacts and abatement measures.
  • Joshi, Bishnu Prasad; Vogt, Rolf David; Zhou, Bin & Wibetoe, Grethe (2014). Assessment of phosphorus loss risk from soil - a case study from Yuqiao reservoir local watershed in north China.
  • Nguyen, Viet Hung; Kifle, Dejene & Wibetoe, Grethe (2014). 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.
  • Ojwando, Wycliffe Omondi; Vogt, Rolf David; Mohr, Christian Wilhelm & Wibetoe, Grethe (2014). Monitoring of phosphorous fractions – Understanding the hydrogeochemical processes governing mobilization and transfer of phosphorous in an agricultural watershed in north-eastern China.
  • Pettersen, Ellen; Vogt, Rolf David; Zhou, Bin & Wibetoe, Grethe (2014). Soil phosphorus pools and their relation to land-use and soil physiochemical properties – A case study of an agricultural watershed in north-eastern China.
  • Ramzan, Muhammad; Kifle, Dejene & Wibetoe, Grethe (2014). Separation of lanthanoides on reverse phase columns modified with various ligands: Utilizing ICP-MS as detector.
  • Kifle, Dejene; Wibetoe, Grethe & Frøseth, Morten (2013). 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 .
  • Wibetoe, Grethe; Kifle, Dejene & Nguyen, Viet Hung (2013). Bestemmelse av sjeldne jordartsmetaller med ICP-MS.
  • Wærsted, Frøydis Meen; Omtvedt, Jon Petter; Wibetoe, Grethe & Vogt, Rolf David (2013). The role of particles and phosphorus bound to particles in eutrophication.
  • Lichtenthaler, Rainer; Wibetoe, Grethe & Røyset, Oddvar (2012). Flow Scheme for Water Sampling and Analyses.
  • Wolle, Mesay Mulugeta; Wibetoe, Grethe; Engelsen, Christian John & Vogt, Rolf David (2010). Fractionation and speciation analyses of oxyanion-forming metals and metalloids in leachates from cement-based materials: Optimization and application of analytical methodologies .
  • Mulugeta, Mesay; Engelsen, Christian John; Wibetoe, Grethe & Lund, Walter (2009). Evaluation of the distribution of Cr and Mo species in leachates from recycled concretes applied in road constructions.
  • Wibetoe, Grethe (2009). Akkreditering knyttet til ICP-OES og ICP-MS.
  • Mulugeta, Mesay; Wibetoe, Grethe; Engelsen, Christian John & Lund, Walter (2008). Based on ion-exchange solid phase extraction: Environmental monitoring of trace elements. Kjemi.  ISSN 0023-1983.  (7), s 6- 8
  • Mulugeta, Mesay; Wibetoe, Grethe; Engelsen, Christian John & Lund, Walter (2008). Fractionation analysis of trace elements in leachates of cement-based materials using ion exchange sorbents over a wide pH range.
  • Mosetlha, Kabo; Wibetoe, Grethe; Lund, Walter & Torto, Nelson (2007). Development of ultrasound and microwave accelerated single extraction methods for rapid assessment of metal bioavailability in soils obtained from a Cu and Ni mineralized area in Botswana.
  • Wibetoe, Grethe & Alemayehu, Asfaw (2007). Sample introduction combining vapor generation and nebulization for simultaneous determination of vapor-forming and non-vapor-forming elements in plasma spectrometric techniques (ICP-AES and ICP-MS).
  • Xie, Ruikai; Seip, Hans Martin; Wibetoe, Grethe & Hanssen, Jan Eric (2007). Characteristics of airborne particulates in urban areas .
  • Alemayehu, Asfaw & Wibetoe, Grethe (2006). Use of solid sampling ETV for solving spectral interferences in ICP-AES.
  • Haei, Mahsa; Seip, Hans Martin; Larssen, Thorjørn; Vogt, Rolf David & Wibetoe, Grethe (2006). Heavy Metals in Forest Soils in Southern China.
  • Mosetlha, Kabo; Wibetoe, Grethe; Lund, Walter & Torto, Nelson (2006). Development of microwave and ultrasound accelerated single extraction methods for evaluation of bioavailable metals in soils determined by ICP-MS.
  • Engelsen, Christian John; Van der Sloot, Hans A; Petkovic, Gordana; Wibetoe, Grethe; Stoltenberg-Hansson, Erik & Lund, Walter (2006). Constituent release predictions for recycled aggregates at field site in Norway.
  • Mulugeta, Mesay; Wibetoe, Grethe; Engelsen, Christian John & Alemayehu, Asfaw (2006). Simultaneous determination of hydride-forming and non-hydride-forming elements in leachates from cement material by ICP-MS.
  • Aspmo, Katrine; Berg, Torunn; Brooks, Steve; Lindberg, Steve & Wibetoe, Grethe (2005). Near and Below Snow Surface Gradient Measurements of Hg During Barrow Artic Mecury Study (BAMS) 2004.
  • Wibetoe, Grethe (2005). Diverse artikler innen kjemi (analytisk og tilstøtende områder), I: Petter Henriksen (red.),  Store norske leksikon 4.utg.  Kunnskapsforlaget.  ISBN 8257315354.  div. bind.
  • Asfaw, Alemayehu & Wibetoe, Grethe (2004). Direct analysis of various beverages (beer, coffeee and milk) by ICP-AES and ICP-MS using dual mode sample introduction system for simultaneous determination of hydride and non-hydride forming elements.
  • Sawula, Gerald M; Wibetoe, Grethe; Lund, Walter & Nkoane, Bonang (2004). Identification of (potential) new Cu and Ni indicator plants from mineralized locations in Botswana.
  • Wibetoe, Grethe (2004). Environmental Monitoring Methodologies for Trace Elements Utilizing Electrothermal Vaporization Inductively Coupled Atomic Emission Spectrometry (ETV-ICP-AES).
  • Wibetoe, Grethe (2004). Gjenoppfrisking av noen statistiske begreper - Anvendelse innen validering av analysemetoden.
  • Sjåstad, Knut-Endre; Jacobsen, Nina O & Wibetoe, Grethe (2003). The use of scanning electron microscope as a quantitative tool in paint analysis. Forensic Science International.  ISSN 0379-0738.  136, s 356
  • Wibetoe, Grethe (2003). Alternative prøveinnføringsmetoder for ICP-AES og ICP-MS.
  • Wibetoe, Grethe & Asfaw, Alemayehu (2003). The use of fluor-assisted atomization for the determination of titanium using ultrasonic slurry sampling graphite furnace atomic absorption spectrometry.
  • Valdal, Anne-Kari; Berg, Torunn & Wibetoe, Grethe (2002). Prøvetaking og bestemmelse av gassformig divalent kvikksølv (GDM). Kjemi.  ISSN 0023-1983.  s 20- 23
  • Bye, Ragnar; Heldal, Vetle & Wibetoe, Grethe (2002). "Micro-wave decomposition methods for "difficult" metallurgical samples included high-carbon materials".
  • Heldal, Vetle; Wibetoe, Grethe & Bye, Ragnar (2002). "Totaluppslutning av metallurgiska prover för bestämning av spårelement med ICP-AES och ICP-MS".
  • Wibetoe, Grethe (2002). Electrothermal vaporization inductively coupled plasma mass spectrometry (ETV-ICP-MS). New applications.
  • Wibetoe, Grethe (2002). Grafittovn for prøveinnføring til ICP-MS.
  • Berg, Torunn; Sekkeseter, S.; Steinnes, Eiliv & Wibetoe, Grethe (2001). Artic springtime depletion of mercury as observed in the European artic.
  • Valdal, Anne-Kari; Berg, Torunn & Wibetoe, Grethe (2001). Developing a method for sampling and measuring RGM (reactive gaseous mercury) in ambient air.
  • Sawula, Gerald; Takuwa, David; Wibetoe, Grethe & Lund, Walter (2001). Determination of copper and nickel in plants, from mineralised areas in Botswana, using slurry sampling electrothermal atomic absorption spectrometry.
  • Korsmo, Åse Jensløkken; Martinsen, Ivar; Toft, Kim G.; Friisk, Grete A. & Wibetoe, Grethe (2000). Determination of Metabolites in Urine from a Manganese Based Contrast Agent by LC-ICP-MS.
  • Wibetoe, Grethe (2000). Bestemmelse av metaller med atomspektrometriske metoder - en oppdatering.
  • Wibetoe, Grethe & Lilleengen, Beate (2000). Total and bioavailable content of Cr and Co in soil analyzed with graphite furnace atomic absorption spectrometry (GFAAS).
  • Wibetoe, Grethe (1999). Bruk av "slurry sampling" i grafittovnsteknikker.
  • Buseth, Erik; Wibetoe, Grethe & Martinsen, Ivar (1998). Determination of endogenous concentrations of the lanthanides in biological materials using electrothermal vaporization inductively coupled plasma mass spectrometry.
  • Wibetoe, Grethe (1998). Slurry prøveinnføring i atomspektroskopi.
  • Wibetoe, Grethe & Engelsen, Christian John (1998). Determination of Aluminium, Copper, Lithium and Manganese in Plants by Slurry Sampling Electrothermal Atomic Absorption Spectrometry.
  • Wibetoe, Grethe (1996). Accuracy in analytical method.

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Published Nov. 11, 2010 9:00 AM - Last modified May 4, 2015 11:05 AM

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