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Determination of Contents of Cu, Mn, Fe, Zn, Ca, Mg, K and Na in Rice Using Microwave Digestion and Inductively Coupled Plasma-Optical Emission Spectrometry

YE Run1, LIU Fang-zhu1, LIU Jian1, CUI Ya-juan1,*, WANG Jing1, LI Dong1, WANG Zhu2, MEN Jian-hua2, WANG Guo-dong2   

  1. 1. Beijing Research Institute for Nutritional Resources, Beijing 100069, China;
    2. National Institute of Nutrition and Food Safety, Chinese Center for Disease Control and Prevention, Beijing 100050, China
  • Online:2014-03-25 Published:2014-04-04
  • Contact: CUI Ya-juan

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Abstract:

A method was established for the determination of copper, manganese, iron, zinc, potassium, sodium, magnesium
and calcium in rice by inductively coupled plasma-optical emission spectrometry (ICP-OES) after microwave digestion.
The detection limits of the method varied from 0.9 to 12 μg/L, with a linear correlation coefficient (r) ≥ 0.999 65, a relative
standard deviation (RSD) < 5.0%, and the spike recovery rates were in the range from 96.7% to 104.3%. Wheat reference
material was satisfactorily determined by the proposed method. Thus, this method is suitable for the determination of
nutrient elements in rice.

Key words: microwave digestion, inductively coupled plasma-optical emission spectrometry (ICP-OES), micro-elements, rice

CLC Number: