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  • 1.
    Allard, Bert
    et al.
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Karlsson, Stefan
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Greis, Christina
    Örebro universitet, Institutionen för naturvetenskap.
    Pettersson, Håkan
    Linköpng Univ.
    Düker, Anders
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Redistribution of Pu, Am, Cs and Np in salt marsh sediment: Wigtown Merse, Irish Sea2009Inngår i: 8th International Conference on Methods and Applications of Radioanalytical Chemistry (MARC VIII) / [ed] Rolf Zeisler, Kenan Ünlü, Susan Heller-Zeisler, Melville, N.Y.: American Institute of Physics (AIP), 2009, s. 1-24Konferansepaper (Fagfellevurdert)
  • 2.
    Allard, Bert
    et al.
    Örebro universitet, Institutionen för naturvetenskap.
    Karlsson, Stefan
    Greis, Christina
    Örebro universitet, Institutionen för naturvetenskap.
    Pettersson, Håkan
    Düker, Anders
    Redistribution pf Pu, Am, Cs and Np in salt marsh sediment - Wigtown Merse, Irish SeaManuskript (Annet vitenskapelig)
  • 3.
    Grahn, Evastina
    et al.
    Örebro universitet, Institutionen för naturvetenskap.
    Greis, Christina
    Örebro universitet, Institutionen för naturvetenskap.
    Karlsson, Stefan
    Örebro universitet, Institutionen för naturvetenskap.
    Düker, Anders
    Örebro universitet, Institutionen för naturvetenskap.
    Allard, Bert
    Örebro universitet, Institutionen för naturvetenskap.
    Pettersson, Håkan
    Failure of 137Cs and 239/240Pu dating of lake sediments: fallout from nuclear weapons testing and from the Chernobyl accident as well as redistribution processes?Manuskript (Annet vitenskapelig)
  • 4.
    Grahn, Evastina
    et al.
    Örebro universitet, Institutionen för naturvetenskap.
    Greis, Christina
    Örebro universitet, Institutionen för naturvetenskap.
    Karlsson, Stefan
    Düker, Anders
    Allard, Bert
    Örebro universitet, Institutionen för naturvetenskap.
    Pettersson, Håkan
    Failure of 137Cs and 239,240Pu dating of lake sediments: fallout from nuclear weapons testing, the Chernobyl accident and redistribution processes?Manuskript (preprint) (Annet vitenskapelig)
  • 5.
    Greis, Christina
    Örebro universitet, Institutionen för naturvetenskap.
    Rapid analysis of actinide isotopes using quadrupole ICP-MS for emergency preparedness and environmental monitoring2007Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Transuranium elements in the environment are mainly derived from nuclear weapons testing and the nuclear fuel cycle. Of growing concern are illicit nuclear trafficking and the threat of terror acts. The development of rational methods, for environmental monitoring and for tracing sources of nuclear and radioactive materials in the environment, is constantly required.

    Traditionally, the actinides have been determined by radiometric techniques. These analyses can be time consuming for elements at low concentrations and with long half-lives. This thesis addresses the determination of actinides, especially plutonium, in environmental samples with ICP-QMS (inductively coupled plasma quadrupole mass spectrometry). The ICP-QMS instrument was equipped with an USN (ultrasonic nebuliser), which proved to be a successful combination for the determination of plutonium at low concentrations in acidified solutions after separation with anion exchange. The detection limit for plutonium was in the range 10-30 pg/l with a RSD of 1-10%. The suitability of chemical separation was evaluated for anion exchange, liquid-liquid-extraction and extraction chromatography.

    The outlined procedure, including sample dissolution, chemical separation and analysis, for determination of actinides in environmental matrices proved to be accurate and reliable. Quality assurance of the procedure was performed during an intercomparison exercise and with reference materials. The detection accuracy has also been validated with α-spectrometry and ICP-SFMS. The procedure has been applied to saline sediments and fresh water sediments as well as several fresh water matrices.

    Delarbeid
    1. Determination of plutonium in environmental samples with quadrupole ICP-MS
    Åpne denne publikasjonen i ny fane eller vindu >>Determination of plutonium in environmental samples with quadrupole ICP-MS
    Vise andre…
    2008 (engelsk)Inngår i: Journal of Radioanalytical and Nuclear Chemistry, ISSN 0236-5731, E-ISSN 1588-2780, Vol. 275, nr 1, s. 55-70Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    A method for rapid determination of plutonium isotopes in environmental samples with ultrasonic nebulisation and quadrupole ICP-MS detection was established. Techniques for sample dissolution, pre-concentration and chemical separation were evaluated and the optimal scheme outlined. Comparisons with α-spectrometry and high resolution ICP-MS confirmed the suitability of the method when applied to different environmental matrices within the global fallout concentration range in the northern hemisphere as well as more contaminated sites. Operational detection limits were 0.5–1.5 fg/l for fresh waters and 0.03–0.1 ng/kg for lake sediments and saline marsh sediments.

    sted, utgiver, år, opplag, sider
    Berlin: Springer, 2008
    HSV kategori
    Forskningsprogram
    Kemi
    Identifikatorer
    urn:nbn:se:oru:diva-3231 (URN)10.1007/s10967-006-7004-z (DOI)000251867200007 ()2-s2.0-37549053953 (Scopus ID)
    Tilgjengelig fra: 2007-02-13 Laget: 2007-02-13 Sist oppdatert: 2018-01-13bibliografisk kontrollert
    2. Rapid method for ICP-MS analysis of plutonium in sediment samples
    Åpne denne publikasjonen i ny fane eller vindu >>Rapid method for ICP-MS analysis of plutonium in sediment samples
    Vise andre…
    2004 (engelsk)Manuskript (preprint) (Annet vitenskapelig)
    HSV kategori
    Forskningsprogram
    Miljövetenskap
    Identifikatorer
    urn:nbn:se:oru:diva-3232 (URN)
    Tilgjengelig fra: 2007-02-13 Laget: 2007-02-13 Sist oppdatert: 2017-10-18bibliografisk kontrollert
    3. Redistribution pf Pu, Am, Cs and Np in salt marsh sediment - Wigtown Merse, Irish Sea
    Åpne denne publikasjonen i ny fane eller vindu >>Redistribution pf Pu, Am, Cs and Np in salt marsh sediment - Wigtown Merse, Irish Sea
    Vise andre…
    (engelsk)Manuskript (Annet vitenskapelig)
    HSV kategori
    Forskningsprogram
    Miljövetenskap
    Identifikatorer
    urn:nbn:se:oru:diva-3233 (URN)
    Tilgjengelig fra: 2007-02-13 Laget: 2007-02-13 Sist oppdatert: 2017-10-18bibliografisk kontrollert
    4. Plutonium remobilization in a humic-rich lake
    Åpne denne publikasjonen i ny fane eller vindu >>Plutonium remobilization in a humic-rich lake
    Vise andre…
    2007 (engelsk)Inngår i: Journal of Radioanalytical and Nuclear Chemistry, ISSN 0236-5731, E-ISSN 1588-2780, Vol. 277, nr 1, s. 265-268Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    Fresh water from Lake Svartsjön, Sweden, was collected and four fractions were prepared: (1) adsorption on DEAE, (2) flocculation with Ca2+, (3) co-precipitation with Fe hydrous oxide and (4) co-precipitation with Mn hydrous oxide. The plutonium level in the lake is 65 fg/l (222 μBq/l), measured by ICP-QMS and ICP-SFMS. Pronounced accumulation in fractions (1) (34%) and (2) (66%), combined with observed levels of organic matter indicate that plutonium is predominantly associated with organic matter. Measurements of isotopic ratios indicate that 77% of the plutonium originates from weapons testing and the remaining appears to originate from the Chernobyl accident.

    HSV kategori
    Forskningsprogram
    Miljövetenskap
    Identifikatorer
    urn:nbn:se:oru:diva-3234 (URN)10.1007/s10967-008-0741-4 (DOI)000257318800041 ()2-s2.0-46449100013 (Scopus ID)
    Tilgjengelig fra: 2007-02-13 Laget: 2007-02-13 Sist oppdatert: 2017-12-14bibliografisk kontrollert
    5. Failure of 137Cs and 239,240Pu dating of lake sediments: fallout from nuclear weapons testing, the Chernobyl accident and redistribution processes?
    Åpne denne publikasjonen i ny fane eller vindu >>Failure of 137Cs and 239,240Pu dating of lake sediments: fallout from nuclear weapons testing, the Chernobyl accident and redistribution processes?
    Vise andre…
    (engelsk)Manuskript (preprint) (Annet vitenskapelig)
    HSV kategori
    Forskningsprogram
    Miljövetenskap
    Identifikatorer
    urn:nbn:se:oru:diva-3235 (URN)
    Tilgjengelig fra: 2007-02-13 Laget: 2007-02-13 Sist oppdatert: 2017-10-18bibliografisk kontrollert
  • 6.
    Greis, Christina
    et al.
    Örebro universitet, Institutionen för naturvetenskap.
    Duker, Anders
    Man-Technology-Environment Research Centre, Örebro University, Örebro, Sweden.
    Allard, Bert
    Örebro universitet, Institutionen för naturvetenskap.
    Roos, Per
    Department of Radiation Physics, Lund University Hospital, Lund, Sweden; Risø National Laboratory, Roskilde, Denmark.
    Holm, Elis
    Department of Radiation Physics, Lund University Hospital, Lund, Sweden; .
    Plutonium remobilization in a humic-rich lake2007Inngår i: Journal of Radioanalytical and Nuclear Chemistry, ISSN 0236-5731, E-ISSN 1588-2780, Vol. 277, nr 1, s. 265-268Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Fresh water from Lake Svartsjön, Sweden, was collected and four fractions were prepared: (1) adsorption on DEAE, (2) flocculation with Ca2+, (3) co-precipitation with Fe hydrous oxide and (4) co-precipitation with Mn hydrous oxide. The plutonium level in the lake is 65 fg/l (222 μBq/l), measured by ICP-QMS and ICP-SFMS. Pronounced accumulation in fractions (1) (34%) and (2) (66%), combined with observed levels of organic matter indicate that plutonium is predominantly associated with organic matter. Measurements of isotopic ratios indicate that 77% of the plutonium originates from weapons testing and the remaining appears to originate from the Chernobyl accident.

  • 7.
    Greis, Christina
    et al.
    Örebro universitet, Institutionen för naturvetenskap.
    Düker, Anders
    Pettersson, Håkan
    Karlsson, Stefan
    Allard, Bert
    Rapid method for ICP-MS analysis of plutonium in sediment samples2004Manuskript (preprint) (Annet vitenskapelig)
  • 8.
    Greis, Christina
    et al.
    Örebro universitet, Institutionen för naturvetenskap.
    Karlsson, Stefan
    Örebro universitet, Institutionen för naturvetenskap.
    Düker, Anders
    Örebro universitet, Institutionen för naturvetenskap.
    Pettersson, Håkan
    Radiofysikavdelningen, O-centrum US, Universitetssjukhuset, Linköping, Sweden .
    Allard, Bert
    Örebro universitet, Institutionen för naturvetenskap.
    Determination of plutonium in environmental samples with quadrupole ICP-MS2008Inngår i: Journal of Radioanalytical and Nuclear Chemistry, ISSN 0236-5731, E-ISSN 1588-2780, Vol. 275, nr 1, s. 55-70Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A method for rapid determination of plutonium isotopes in environmental samples with ultrasonic nebulisation and quadrupole ICP-MS detection was established. Techniques for sample dissolution, pre-concentration and chemical separation were evaluated and the optimal scheme outlined. Comparisons with α-spectrometry and high resolution ICP-MS confirmed the suitability of the method when applied to different environmental matrices within the global fallout concentration range in the northern hemisphere as well as more contaminated sites. Operational detection limits were 0.5–1.5 fg/l for fresh waters and 0.03–0.1 ng/kg for lake sediments and saline marsh sediments.

1 - 8 of 8
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