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Fresenius' Journal of Analytical Chemistry

, Volume 359, Issue 4–5, pp 445–449 | Cite as

Stable isotope labels as a tool to determine the iron absorption by Peruvian school children from a breakfast meal

  • T. Walczyk
  • Lena Davidsson
  • Nelly Zavaleta
  • Richard F. Hurrell
Poster

Abstract

Fractional iron absorption from a breakfast meal was determined in Peruvian children employing stable iron isotopes as labels. Iron isotopic analysis was performed by the recently developed negative thermal ionization technique for high-precision iron isotope ratio measurements using FeF4 ions. By increasing the ascorbic acid content of the standard breakfast meal as served within the Peruvian school-breakfast program from 27 mg to 70 mg, it was possible to increase the geometric mean fractional iron absorption significantly from 5.1% (range 1.6–13.5%) to 8.2% (range 3.1–25.8%). Fractional iron absorption was calculated according to isotope dilution principles and by considering the non-monoisotopic character of the used spikes.

Keywords

Stable Isotope Isotope Label Ascorbic Acid Content Thermal Ionization Ionization Technique 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • T. Walczyk
    • 1
  • Lena Davidsson
    • 1
  • Nelly Zavaleta
    • 2
  • Richard F. Hurrell
    • 1
  1. 1.Eidgenössische Technische Hochschule Zürich, Labor für Humanernährung, Seestrasse 72, CH-8003 Rüschlikon, SwitzerlandCH
  2. 2.Instituto de Investigacion Nutricional, Apartado 18-0191, Lima 18, PeruXX

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