Determination of Mn and Zn in rice by energy dispersive x-ray fluorescence spectrometry

Quimica nova

Castro, Martha T. P. O.¹  Korn, Maria das Graças Andrade²  Quintella, Cristina M.²  Teixeira, Alete Paixão²  Fernandes, Andrea P.³ 

[1] Universidade Federal Rural do Rio de Janeiro, Seropédica, Brasil;Universidade Federal da Bahia, Salvador, Brasil;Universidade Federal de Alagoas, Maceió, Brasil

关键词: rice;    essential elements;    EDXRF.;   

DOI  :  10.1590/S0100-40422012000600012

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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