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Identification of Pomegranate from Different Producing Areas of Xinjiang Based on Mineral Profile

WANG Rui1,2, WANG Qiang1,2, WANG Cun1, WU Hongbin3,*   

  1. 1. Department of Biological and Chemical Engineering, Chongqing University of Education, Chongqing 400067, China;
    2. Institute of Food Safety and Nutrition, Chongqing University of Education, Chongqing 400067, China; 3. Institute of Agro-
    Products Processing Science and Technology, Xinjiang Academy of Agricultural and Reclamation Science, Shihezi 832000, China
  • Online:2015-03-25 Published:2015-03-17
  • Contact: WU Hongbin

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Abstract:

The concentrations of 12 mineral elements in the edible part and seeds of 36 pomegranate samples collected
from 6 different producing areas of Xinjiang were determined by inductively coupled plasma-atomic emission spectrometry
(ICP-AES) and analyzed by principal component analysis (PCA) and linear discriminate analysis (LDA). Two three-factor
models accounting for 84.29% and 60.33% of data variability for the metal element composition of the edible part and seeds,
respectively were established by PCA. Thirty-six pomegranate samples were classified into six groups by PCA, agreeing
with the producing areas. A satisfactory classification of the edible part and seeds of pomegranate was obtained with
overall correct classification rates of both 100%, and cross-validation rates of 100% and 94.44%, respectively. Thus, this
discrimination method can be applied in the geographic origin discrimination of pomegranate.

Key words: pomegranate (Punica granatum L.), metal elements, principal component analysis (PCA), linear discriminant analysis (LDA), inductively coupled plasma-atomic emission spectrometry (ICP-AES)

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