DETERMINATION OF Mn AND Zn IN RICE BY ENERGY DISPERSIVE X-RAY FLUORESCENCE SPECTROMETRY

作者：Teixeira Alete Paixao^*; Quintella Cristina M; Andrade Korn Maria das Gracas; Fernandes Andrea P; Castro Martha T P O

来源：Quimica Nova, 2012, 35(6): 1133-1136.

DOI：10.1590/S0100-40422012000600012

• rice
• essential elements
• EDXRF

DETERMINATION OF Mn AND Zn IN RICE BY ENERGY DISPERSIVE X-RAY FLUORESCENCE SPECTROMETRY. 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 (3 sigma) 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.

• 出版日期2012