title: Determination of selenium in urine by hydride generation atomic absorption spectrometry.
abstract: A procedure has been developed for determination of total selenium in urine by hydride generation atomic absorption spectrometry. Mineralization was performed with a nitric acid-perchloric acid mixture on a thermostated digestion block. The method was validated by comparison with the method involving mineralization in a microwave acid digestion bomb containing nitric acid and small amounts of vanadium pentoxide. Se(VI) was reduced to Se(IV) by dissolution in 7N HCl. Sample recoveries, precision studies, and analyses of a certified reference material demonstrated the reliability and accuracy of this technique. Urine samples had selenium concentrations ranging from 4.6 to 50.3 micrograms/L. These values correspond to an average of 54.9 micrograms per person per day total ingested and bioavailable Se in the daily diet.
authors.affiliation: University of Granada, Faculty of Pharmacy, Department of Nutrition and Bromatology, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Navarro
authors.forename: H
authors.initials: H
authors.lastname: Lopez
authors.forename: M C
authors.initials: MC
authors.lastname: Lopez
authors.forename: V
authors.initials: V
authors.lastname: Perez
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D012643:Selenium / Q000652:urine*; D012737:Sex Factors; D013054:Spectrophotometry, Atomic
chemical_list: D012643:Selenium