关键词: 石榴, 金属元素, 主成分分析, 线性判别分析, 电感耦合等离子体原子发射光谱

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)