Determination of selenium in diet by radiochemical neutron activation analysis

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1988
El-Hallaq, Yasser Hassan

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DETERMINATION OF SELENIUM IN HUMAN DIETS BY RADIOCHEMICAL NEUTRON-ACTIVATION ANALYSIS
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A post-irradiation radiochemical separation technique was tested for the determination of selenium levels in diet samples, collected by using a duplicate portion technique, from both rural and urban population groups in Turkey. The technique involved sample irradiation, acid digestion, selective distillation, precipitation and filtration steps. During the separations it was possible to determine the yield of each sample using a stable selenium carrier. An average chemical yield of 71 +/- 3% was obtained ...
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The selenium content of Turkish diets was determined by Zeeman effect graphite furnace atomic absorption spectrometry (GFAAS). Samples, collected from two different socioeconomic groups by duplicate portion technique, were digested with concentrated nitric acid in acid bombs, and hydrogen peroxide was added for complete oxidation. The digested solutions were then analyzed by GFAAS with the nickel chemical modifier addition. The detection limit for Se(VI) was 10.5 ng/mL for aqueous standard solutions. Averag...
Determination of phytate in the Turkish diet by phosphorus-31 Fourier transform nuclear magnetic resonance spectroscopy
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ThephytatecontentofdailydietsamplesfromuppermiddleclassfamiliesinTurkeywasdeter-minedbyphosphorus-31Fouriertransformnuclearmagneticresonancespectroscopy(31PFTNMR).Samples,collectedbyaduplicate-portiontechnique,werehomogenizedandfreeze-dried.Dietsam-pleswerestirredfor0.5hinaqueous3%(w/v)trichloroaceticacid,EDTAwasadded,andthepHwasadjustedto4.5±0.5beforeanalysis.Theaveragephytatecontentof10dietsampleswasfoundtobe1.55±0.70g/kg
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Arı, Ülkü; Aras, Namık K.; Volkan, Mürvet; Department of Chemistry (1988)
Determination of minor and trace elements in human diet by atomic absorption spectroscopy
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Citation Formats
Y. H. El-Hallaq, “Determination of selenium in diet by radiochemical neutron activation analysis,” Middle East Technical University, 1988.