caa a22 4500 469111941 CHVBK 20180323133113.0 cr unu---uuuuu 170328e19920801xx s 000 0 eng 10.1007/BF02034881 doi (NATIONALLICENCE)springer-10.1007/BF02034881 Fluorine determination in diet samples using cyclic INAA and PIGE analysis [Elektronische Daten] [A. Farooqi, W. Arshed, O. Akanle, C. Jeynes, N. Spyrou] Fluorine is an important trace element for life and human well-being. Food, in general, provides about 40 percent of the fluorine intake in the human body. In order to measure fluorine levels in human diet samples, Instrumental Neutron Activation Analysis (INAA) and Proton Induced Gamma-ray Emission (PIGE) analysis were used. Reactions19F(n,γ)20F and19F(n, p)19O were employed for determination of the fluorine concentration using a reactor neutron spectrum and epithermal neutrons. Corrections were made for the sodium matrix interference caused by the23Na(n, α)20F threshold reaction in the case of reactor neutron cyclic activation analysis and for the oxygen interference via18O(n, γ)19O reaction when using the epithermal cyclic NAA method. The fluorine content of the diet samples was also determined by PIGE analysis making use of the resonance reaction19F(p, αγ)16O at 872 keV. Cyclic Neutron Activation Analysis (CNAA) when combined with mass fractionation was found to be the most suitable for determination of low concentration of fluorine, through the19F(n, γ)20F reaction with a detection limit of 2.2 ppm in Bowen's Kale elemental standard. Akadémiai Kiadó, 1992 Farooqi A. Department of Physics, University of Surrey, GU2 5XH, Guildford, Surrey, UK aut Arshed W. Department of Physics, University of Surrey, GU2 5XH, Guildford, Surrey, UK aut Akanle O. Department of Physics, University of Surrey, GU2 5XH, Guildford, Surrey, UK aut Jeynes C. Department of Electronic and Electrical Engineering, University of Survey, GU2 5XH, Guildford, Surrey, UK aut Spyrou N. Department of Physics, University of Surrey, GU2 5XH, Guildford, Surrey, UK aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 161/1(1992-08-01), 71-78 0236-5731 161:1<71 1992 161 10967 https://doi.org/10.1007/BF02034881 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02034881 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Farooqi A. Department of Physics, University of Surrey, GU2 5XH, Guildford, Surrey, UK aut NATIONALLICENCE 700 1- Arshed W. Department of Physics, University of Surrey, GU2 5XH, Guildford, Surrey, UK aut NATIONALLICENCE 700 1- Akanle O. Department of Physics, University of Surrey, GU2 5XH, Guildford, Surrey, UK aut NATIONALLICENCE 700 1- Jeynes C. Department of Electronic and Electrical Engineering, University of Survey, GU2 5XH, Guildford, Surrey, UK aut NATIONALLICENCE 700 1- Spyrou N. Department of Physics, University of Surrey, GU2 5XH, Guildford, Surrey, UK aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 161/1(1992-08-01), 71-78 0236-5731 161:1<71 1992 161 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer