Determination of Ca, Cu, Fe and Mg in fresh and processed meat treated with tetramethylammonium hydroxide by atomic absorption spectrometry

Journal of the Brazilian Chemical Society

Adriane M. Nunes²  Tanize S. Acunha²  Eliézer Q. Oreste²  Fábio G. Lepri¹  Mariana A. Vieira²  Adilson J. Curtius¹  Anderson S. Ribeiro² 

[1] ,Universidade Federal de Pelotas Programa de Pós-Graduação em Química Laboratório de Metrologia QuímicaCapão do Leão RS ,Brazil

关键词: tetramethylammonium hydroxide;    fresh and processed meat;    atomic absorption spectrometry;    trace metals;   

DOI  :  10.1590/S0103-50532011001000004

来源: SciELO

【 摘 要 】

A simple method for treating fresh and processed meat with tetramethylammonium hydroxide (TMAH) is proposed for the determination of Ca, Fe and Mg by flame atomic absorption spectrometry (FAAS) and Cu by graphite furnace atomic absorption spectrometry (GFAAS). The accuracy was evaluated by comparison of the results by using two other sample preparation procedures and by the analysis of certified reference materials. No significant differences between the results were found at the 95% confidence level. Limits of detection for Ca, Cu, Fe and Mg were 45.0, 0.2, 16.0 and 0.3 µg g-1, respectively. High-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GFAAS) was employed to evaluate the spectral interference in the determination of Cu. However, no interference was found. The proposed method is simple, fast and reliable for meat products analysis and does not require especial equipment, neither strong acid for sample preparation.

【 授权许可】

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