FOOD SCIENCE

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Analysis of 18 Elements in Seed Coats of Mung Bean, Adzuki Bean and Black Soybean

WANG Qiaohuan1, JIANG Junping2,*, FU Huimin1, MENG Ling1, LI Hong1   

  1. 1. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences,
    Chinese Academy of Sciences, Beijing 100085, China;
    2. Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Online:2015-10-25 Published:2015-10-20
  • Contact: JIANG Junping

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Abstract:

In order to fully develop and utilize bean coat resources and increase the added value of processed bean products,
the contents of N, C, S, Ca, Mg, K, P, Na, B, Ba, Co, Cr, Cu, Fe, Mn, Ni, Zn and Sr in the seed coats of mung bean, adzuki
bean and black soybean were determined by elemental analyzer (EA) and inductively coupled plasma-atomic emission
spectrometer (ICP-AES). The limits of detection (LODs) for the elements N, C and S with an elemental analyzer were
32–96 μg/g, and recovery rates were 97%–115% with relative standard deviations (RSDs) of 0.20%–2.63% (n = 5). The
LODs for the elements Ca, Mg, K, P, Na, B, Ba, Co, Cr, Cu, Fe, Mn, Ni, Zn and Sr with ICP-AES were between 0.02 and
152 μg/g, and recovery rates were in the range of 84%–118% with RSDs of 0.44%–4.46% (n = 5). The soybean standard
substance was measured using the developed methods, and the results indicated that the contents of N, Mg, P, B, Ba, Co,
Cr, Mn, Ni, Zn and Sr were within the recommended range, while the contents of S, Ca, K, Na, Cu and Fe were close to the
recommended values. The analytical methods proved to be rapid and simple and can be applied for elemental analysis.

Key words: mung bean coat, adzuki bean coat, black soybean coat, elemental analyzer (EA), inductively coupled plasma-atomic emission spectrometer (ICP-AES), element contents

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