Journal article
Identification of radionuclide partitioning in soils and sediments: Determination of optimum conditions for the exchangeable fraction of the nIST standard sequential extraction protocol
Applied radiation and isotopes, Vol.49(9), pp.1289-1293
1998
DOI: 10.1016/S0969-8043(97)10062-8
Abstract
We are developing the NIST standard sequential extraction protocol for identifying the fractionation of radioactive elements in soils and sediments. The procedure is designed to partition a soil or sediment sample into six operationally-defined fractions. A full-factorial experimental design/data analysis methodology was used to establish the optimum conditions for the first of these six fractions, called “exchangeables”. Reaction time, reagent concentration and reaction temperature were chosen as experimental variables. The criteria for choosing optimum conditions were the maximum extraction of
238U combined with a minimum dissolution of non-targeted geochemical phases. Reagent concentration (i.e. ionic strength) is shown to be the controlling factor in the extraction of exchangeable
238U. The optimum (exchangeable) conditions, based on these experiments are: time=1
h; temperature=25°C and concentration=0.4
M MgCl
2.
Details
- Title: Subtitle
- Identification of radionuclide partitioning in soils and sediments: Determination of optimum conditions for the exchangeable fraction of the nIST standard sequential extraction protocol
- Creators
- M.K Schultz - National Institute of Standards and Technology, Ionizing Radiation Division, Building 245, Room C114, Gaithersburg, MD 20899-0001, USAK.G.W Inn - National Institute of Standards and Technology, Ionizing Radiation Division, Building 245, Room C114, Gaithersburg, MD 20899-0001, USAZ.C Lin - National Institute of Standards and Technology, Ionizing Radiation Division, Building 245, Room C114, Gaithersburg, MD 20899-0001, USAW.C Burnett - Department of Oceanography, Florida State University, Tallahassee, FL 32306-3048, USAG Smith - Department of Oceanography, Florida State University, Tallahassee, FL 32306-3048, USAS.R Biegalski - National Institute of Standards and Technology, Ionizing Radiation Division, Building 245, Room C114, Gaithersburg, MD 20899-0001, USAJ Filliben - National Institute of Standards and Technology, Ionizing Radiation Division, Building 245, Room C114, Gaithersburg, MD 20899-0001, USA
- Resource Type
- Journal article
- Publication Details
- Applied radiation and isotopes, Vol.49(9), pp.1289-1293
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/S0969-8043(97)10062-8
- ISSN
- 0969-8043
- eISSN
- 1872-9800
- Language
- English
- Date published
- 1998
- Academic Unit
- Radiology; Stead Family Department of Pediatrics; Radiation Oncology
- Record Identifier
- 9984217452102771
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