Autor(es): Teixeira, Alete Paixão ; Quintella, Cristina Maria Assis Lopes Tavares da Mata Hermida ; Korn, Maria das Graças Andrade ; Fernandes, Andréa Pires ; Castro, Martha Teresa Pantoja de Oliveira
Data: 2014
Origem: Oasisbr
Assunto(s): Rice; Essential elements; EDXRF
p. 1133-1136
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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.
