title: Determination of selenium in duplicate diets of residents of Pinhel, Portugal, by neutron activation.
abstract: A rapid cyclic instrumental neutron activation analysis (CINAA) method has been used to determine the selenium content of 27 duplicate diet samples from each of the 27 districts surrounding Pinhel, Portugal. The accuracy and precision of the CINAA method have been evaluated by analyzing certified reference materials and observed to be within +/- 5-10% for samples containing at least 40 ppb of selenium. The detection limit has been found to vary between 26-42 ppb selenium depending on the sample composition. The average daily dietary intake has been calculated as 37 micrograms of selenium per day.
authors.affiliation: Department of Chemistry, Dalhousie University, Halifax, N.S., Canada.
authors.forename: M F
authors.initials: MF
authors.lastname: Reis
authors.forename: J
authors.initials: J
authors.lastname: Holzbecher
authors.forename: E
authors.initials: E
authors.lastname: Martinho
authors.forename: A
authors.initials: A
authors.lastname: Chatt
mesh_terms: D004032:Diet; D005504:Food Analysis / Q000379:methods* / Q000592:standards / Q000706:statistics & numerical data; D006801:Humans; D009501:Neutron Activation Analysis / Q000379:methods* / Q000592:standards / Q000706:statistics & numerical data; D011174:Portugal; D012015:Reference Standards; D012643:Selenium / Q000008:administration & dosage / Q000032:analysis* / Q000592:standards
chemical_list: D012643:Selenium