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Characterization of Brazilian commercial milks by instrumental neutron activation analysis

  • L. G. C. Santos
  • E. A. De Nadai Fernandes
  • F. S. Tagliaferro
  • M. A. Bacchi
Article

Abstract

Aiming at the determination of toxic and essential elements in Brazilian commercial bovine milk, 25 ultra high temperature (UHT) milk samples were acquired in the local market of Piracicaba, SP. The samples were freeze-dried and analyzed by instrumental neutron activation analysis (INAA) allowing the determination of Br, Ca, Co, Cs, Fe, K, Na, Rb and Zn. When the results were expressed as concentration (mg·l−1) no significant differences were found. However, considering the dry matter, results showed a clear difference between the mass fractions (mg·kg−1 d.w.) of skim milk and whole milk for the elements Br, Ca, K, Na, Rb and Zn, indicating that the removal of fat caused a concentration effect in the dry matter of skim milks. Discrepancies were found between the concentrations of Ca and Na measured by INAA and the values informed in the labels. Ca showed variations within 30% for most samples, while concentrations of Na were up to 190% higher than informed values. The sample preparation and the INAA procedure were appropriate for the determination of Br, Ca, Co, Cs, Fe, K, Na, Rb and Zn in milk samples.

Keywords

International Atomic Energy Agency Instrumental Neutron Activation Analysis Milk Sample Skim Milk Bovine Milk 
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 Science+Business Media, LLC. 2007

Authors and Affiliations

  • L. G. C. Santos
    • 1
  • E. A. De Nadai Fernandes
    • 1
  • F. S. Tagliaferro
    • 1
  • M. A. Bacchi
    • 1
  1. 1.Centro de Energia Nuclear na AgriculturaUniversidade de São Paulo (CENA/USP)PiracicabaBrazil

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