Determination of copper in fish feed by graphite furnace atomic absorption spectrometry using slurry sampling

Renato C. F. Neves, Paula M. Moraes, Fábio A. Silva, Vanessa R. Loureiro, Mayra A. D. Saleh, Cilene C. F. Padilha, Margarida M. Barros, Pedro M. Padilha*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The present work develops and optimizes a method to determine copper in samples of feces and fish feed by graphite furnace atomic absorption spectrometry (GFAAS) through the direct introduction of slurries of the samples into the spectrometer's graphite tube coated internally with metallic rhodium and tungsten carbide that acts as chemical modifiers. The limits of detection (LOD) and quantification (LOQ) calculated for 20 readings of the blank of the standard slurries (0.50% m/v of feces or feed devoid of copper) were 0.24 and 0.79 μg L -1 for the standard feces slurries and 0.26 and 0.87 μg L -1 for the standard feed slurries. The proposed method was applied in studies of absorption of copper in different fish feeds and their results proved compatible with that obtained from samples mineralized by acid digestion using microwave oven.
Original languageEnglish
Pages (from-to)274-279
Number of pages6
JournalSensing and Instrumentation for Food Quality and Safety
Volume2
Issue number4
DOIs
Publication statusPublished - 2008
Externally publishedYes

Keywords

  • Copper determination
  • Fish feed
  • GFAAS
  • Slurries samples

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