Low-level determination of silicon in biological materials using radiochemical neutron activation analysis
Result description
A new radiochemical neutron activation analysis (RNAA) method has been developed for low-level determination of Si in biological materials, which is based on the Si-30(n,gamma)Si-31 nuclear reaction with thermal neutrons. The radiochemical separation consists of an alkaline-oxidative decomposition followed by distillation of SiF4. Nuclear interferences, namely that of the P-31(n,p)Si-31 with fast neutrons, have been examined and found negligible only when irradiation is carried out in an extremely well-thermalized neutron spectrum, such as available at the NIST reactor. The RNAA procedure yields excellent radiochemical purity of the separated fractions, which allows the measurement of the beta(-)-activity of the Si-31 by liquid scintillation counting.
Keywords
The result's identifiers
Result code in IS VaVaI
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Low-level determination of silicon in biological materials using radiochemical neutron activation analysis
Original language description
A new radiochemical neutron activation analysis (RNAA) method has been developed for low-level determination of Si in biological materials, which is based on the Si-30(n,gamma)Si-31 nuclear reaction with thermal neutrons. The radiochemical separation consists of an alkaline-oxidative decomposition followed by distillation of SiF4. Nuclear interferences, namely that of the P-31(n,p)Si-31 with fast neutrons, have been examined and found negligible only when irradiation is carried out in an extremely well-thermalized neutron spectrum, such as available at the NIST reactor. The RNAA procedure yields excellent radiochemical purity of the separated fractions, which allows the measurement of the beta(-)-activity of the Si-31 by liquid scintillation counting.
Czech name
Stanovení nízkých koncentrací křemíku radiochemickou neutronovou aktivační analýzou
Czech description
Byla vyvinuta nová metoda radiochemické neutronové aktivační analýzy (RNAA) pro stanovení nízkých koncentrací Si v biologických materiálech založená na využití reakce 30Si(n,?)31Si s tepelnými neutrony. Radiochemická separace spočívá v alkalicko-oxidativním tavení vzorků a destilaci SiF4 a poskytuje frakce s vysokou radiochemickou čistotou. Byly stanoveny obsahy Si na úrovni jednotek až stovek ?g/g v řadě biologických referenčních materiálů a porovnány s literárními hodnotami.
Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BG - Nuclear, atomic and molecular physics, accelerators
OECD FORD branch
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Result continuities
Project
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2005
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Radioanalytical and Nuclear Chemistry
ISSN
0236-5731
e-ISSN
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Volume of the periodical
263
Issue of the periodical within the volume
3
Country of publishing house
HU - HUNGARY
Number of pages
6
Pages from-to
811-816
UT code for WoS article
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EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
BG - Nuclear, atomic and molecular physics, accelerators
Year of implementation
2005