Distribution and behaviour of99Tc,237Np,239,240Pu, and241Am in the coastal and estuarine sediments of the Irish Sea

Kim, C. K.; Morita, S.; Seki, Riki; Takaku, Yuichi; Ikeda, Nagao; Assinder, David

doi:10.1007/bf02037434

Cited by 27 publications

(8 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…234 U and 230 Th (Holm and Nilsson, 1980). Due to the low background in the high-mass region and the low detection limit, ICP-MS techniques have been used for several environmental studies of 237 Np, in soil (Bunzl et al, 1995) and sediments (Assinder et al, 1991;Kim et al, 1992;Morris et al, 2000;Kenna and Sayles, 2002). The 240 Pu/ 239 Pu atomic ratio has been determined by the ICP-MS technique in soil (Muramatsu et al, 2000;Muramatsu et al, 2001;Tonouchi et al, 2002) and in the marine environment (Chiappini et al, 1999;Eroglu et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Distribution of Np and Pu in Swedish lichen samples (Cladonia stellaris) contaminated by atmospheric fallout

Lindahl

Roos

Eriksson

et al. 2004

Journal of Environmental Radioactivity

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Distribution of Np and Pu in Swedish lichen samples (Cladonia stellaris) contaminated by atmospheric fallout

Lindahl

Roos

Eriksson

et al. 2004

Journal of Environmental Radioactivity

View full text Add to dashboard Cite

“…By means of a double focusing analyzer the mass resolution is improved and the background is reduced since especially no photons reach the detector due to a longer and more complicated ion flight path and the use of narrow slits and lenses. Such a facility delivers a detection limit of 0.25 pg/ml of ®®®Tc which can further be improved to 8 fg/ml by adding an ultrasonic nebulizer [23,24]. In this way the amount of sample reaching the plasma is increased by at least one order of magnitude from less than 1% to about 10%.…”

Section: Inductively Coupled Plasma Mass Spectrometrymentioning

confidence: 94%

Ultratrace Analysis of Technetium

Trautmann¹

1993

Radiochimica Acta

View full text Add to dashboard Cite

Technetium, trace analysis / Radiometrie methods, mass spectrometry, induetively coupledplasma mass spectrometry / Laser resonance ionization mass spectrometry Abstract For radioecological studies and for the measurement of the boron-8 solar neutrino flux in a geochemical experiment small amounts of technetium have to be determined. The applicability of radiometric methods as well as of mass spectrometry and induetively coupled plasma mass spectrometry for trace analysis of technetium is briefly discussed. In more detail laser resonance ionization mass spectrometry (RIMS) for low-level measurements is presented. Using a three-step, three-colour excitation and ionization scheme an overall detection efficiency of 2 x 10"® was obtained resulting in a detection limit of «10^ atoms (1.6 fg) of technetium. With a reflectron time-of-flight mass spectrometer the sensitivity of RIMS can further be improved by one order of magnitude. By means of a laser ion source, made of extremely pure pyrolytically coated graphite, an enhancement by two Orders of magnitude is possible.

show abstract

“…Lower detection limit of 0.6 fg for 99 Tc was achieved by integrating electrothermal vaporization and inductively coupled plasma mass spectrometry (ETV-ICP-MS). 195 Kim et al 97 found suitable measurement conditions for SF-ICP-MS and could compare the 99 Tc concentrations with those of other radionuclides such as 137 Cs and Pu. Tagami and Uchida 101 applied ICP-QMS to measure global fallout 99 Tc in Japanese soils and obtained the concentration range of 4-88 mBq kg À1 .…”

Section: Global Fallout Contaminationmentioning

confidence: 99%