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

Química Nova

Martha T. P. O. Castro¹  Cristina M. Quintella²  Maria das Graças Andrade Korn²  Alete Paixão Teixeira²  Andrea P. Fernandes³ 

[1] Universidade Federal Rural do Rio de Janeiro;Universidade Federal da Bahia;Universidade Federal de Alagoas;

关键词: rice;    essential elements;    EDXRF;   

DOI  :  10.1590/S0100-40422012000600012

来源: DOAJ

【 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】

Unknown