Determinação de Mn e Zn em arroz empregando espectrometria de fluorescência de raios x de energia dispersiva

Química Nova

Alete Paixão Teixeira²  Cristina M. Quintella²  Maria Das Graças Andrade Korn²  Andrea P. Fernandes¹  Martha T. P. O. Castro¹ 

[1] ,Universidade Federal da Bahia Instituto de Química Salvador BA ,Brasil

关键词: rice;    essential elements;    EDXRF;   

DOI  :  10.1590/S0100-40422012000600012

来源: SciELO

【 摘 要 】

A simple, fast and inexpensive method was developed to determine essential elements in pellets of rice samples using energy dispersive X-ray fluorescence spectrometry (EDXRF). The accuracy and precision were evaluated using Standard Reference Material (rice flour NIST 1568a), and yielding relative standard deviation below 5%. The paired t-test showed good agreement within 95% confidence values. The detection limits (3σ) of Mn and Zn were 5.1 and 2.2 mg kg-1, respectively. The proposed method proved to be effective when used to determine Mn and Zn in commercial samples of rice without go by stage of decomposition.

【 授权许可】

CC BY-NC   
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