Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, South Korea.
National Agrobiodiversity Center, Rural Development Administration, Jeonju 54874, South Korea.
Food Chem. 2020 May 15;312:126067. doi: 10.1016/j.foodchem.2019.126067. Epub 2019 Dec 23.
The aim of this study was to discriminate between Korean and Chinese perilla seeds by using inorganic elemental analysis data combined with orthogonal partial least squares-discriminant analysis (OPLS-DA). Inorganic element content data were obtained from 29 Korean and 11 Chinese perilla seed samples distributed in Korea. Using energy dispersive X-ray fluorescence spectroscopy, 11 species of inorganic elements were detected in the perilla seed samples and eight of them were quantified. The Rb content was selected as the variable to best discriminate between Korean and Chinese perilla seeds using an S-plot generated from OPLS-DA. An accurate range for the Rb content was determined using inductively coupled plasma-optical emission spectroscopy. The Rb content is remarkably higher in Chinese perilla seeds (8.7-19.0 mg/kg) than in Korean perilla seeds (0.0-7.6 mg/kg), thereby suggesting that Rb analysis may be an appropriate approach to discriminate Chinese perilla seeds from Korean perilla seeds.
本研究旨在通过无机元素分析数据结合正交偏最小二乘判别分析（OPLS-DA）对韩国和中国紫苏籽进行区分。从分布在韩国的 29 份韩国紫苏籽和 11 份中国紫苏籽样品中获得无机元素含量数据。使用能量色散 X 射线荧光光谱法，在紫苏籽样品中检测到 11 种无机元素，其中 8 种被定量。使用 OPLS-DA 生成的 S 图，选择 Rb 含量作为区分韩国和中国紫苏籽的最佳变量。使用电感耦合等离子体-原子发射光谱法确定 Rb 含量的准确范围。中国紫苏籽的 Rb 含量（8.7-19.0 mg/kg）显著高于韩国紫苏籽（0.0-7.6 mg/kg），因此 Rb 分析可能是区分中国紫苏籽和韩国紫苏籽的一种合适方法。
