The Interference Factors And Amendments Of²⁰F In Cyclic Neutron Activation Analysis

Cyclic neutron activation analysis(CNAA) is a method based on the traditionalneutron activation analysis,which target is to improve the signal to noise ratio andcounting rate of the element to generate short-lived nuclides.In (n,γ) reations,CNAA can greatly shorten the analysis time of elements to not only generate long lifenuclides but also generate short-lived nuclides.Secondly,CNAA will can not onlysingle-element analysis,but also can multi-element analysis.Human lack of fluoride,prone to dental caries,certain procedures affectbone.Fluoride overdose also have adverse effects on the human body,children’sfluorosis mainly for dental fluorosis,adults mainly as skeletal fluorosis.The fluorinephysical requirements of0.5to1milligrams/day,adult body fluorine-containing about2.6grams.The human body is very sensitive to the fluorine content,florine on thebody’s safe range is much narrower than the other trace elements,from the satisfactionof the body to the needs of fluoride due to excessive lead poisoning amount betweensimilar.Thus the fluoride content of the human body is a health-related,it has greatsignificance to detection of the fluoride content.The design discussed accuracy,precision and sensitivity of the determination for20F, whilst also discussed confounding factors of20F and its amendments,whichincluding the dead time and pulse accumulation,radionuclides38Cl、28Al and23Na.Ithad a very large improvement to sensitivity of the determination of20F by cyclicneutron activation analysis,and it could be the ideal measurement results througn thecorrection of interfering factors.Finally,it introduced the epithermal neutron cyclicactivation analysis and maked a simply comparing with thermal neutron cyclicactivation analysis.