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Iron determination by FAAS in fish feed and feces after ultrasound-assisted extraction

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Abstract

This paper proposes a method to determine iron in samples of fish feed and feces using ultrasound in the extraction of the analyte and in subsequent quantification by flame atomic absorption spectrometry. Using HCl 0.10 mol L−1 as the extraction solution, the optimal conditions of extraction were found to be: granulometry of the sample <60 μm; a sonication time of five cycles of 10 s and sonication power of 136 W. The method was applied in studies of the availability of iron in four food sources used in the diet of Nile Tilapia. The results obtained with the proposed extraction method allowed us to calculate the coefficients of apparent digestibility of iron in the food sources, which was not possible when using results obtained from samples mineralized by acid digestion.

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Acknowledgements

The authors gratefully acknowledge the Brazilian agencies FAPESP (Processes 03/13362-6 and 06/51556–5) and CNPq (Processes 474371/2007–7 and 301123/2005–5) for their financial support of this research.

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Authors and Affiliations

  1. Programa de Pós-Graduação em Zootecnia, Faculdade de Medicina Veterinária e Zootecnia, UNESP, Caixa Postal 560, 18618-000, Botucatu, SP, Brazil

    Mayra A. D. Saleh, Renato C. F. Neves, Paula M. Lima, Felipe A. dos Santos & Fábio A. Silva

  2. Instituto de Biociências, Departamento de Química e Bioquímica, UNESP, Caixa Postal 510, 18618-000, Botucatu, SP, Brazil

    Paula M. Moraes & Pedro M. Padilha

Authors
  1. Mayra A. D. Saleh
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  2. Renato C. F. Neves
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  3. Paula M. Moraes
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  4. Paula M. Lima
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  5. Felipe A. dos Santos
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  6. Fábio A. Silva
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  7. Pedro M. Padilha
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Correspondence to Mayra A. D. Saleh.

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Saleh, M.A.D., Neves, R.C.F., Moraes, P.M. et al. Iron determination by FAAS in fish feed and feces after ultrasound-assisted extraction. Sens. & Instrumen. Food Qual. 3, 108–113 (2009). https://doi.org/10.1007/s11694-008-9066-9

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  • DOI: https://doi.org/10.1007/s11694-008-9066-9

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