Ginger (Zingiber officinale) is well-known spice and cultured on a temperate region. We attempted to standardize the ginger using
1H-NMR-metabolomics because the standardization of the ginger has been provided by the quantity of one or a small number of compounds detected in ginger. The score plot of principal component analysis (PCA) using
1H-NMR of the ginger aqueous extract showed some outliers. The results of conducting PCA to the ginger extract except the outliers showed that there are differences between Kintoki species and Amami native species, and between China L5 species and Sanshu Kochi species, China L4 species. Furthermore, we tried to OPLS-DA to evaluate the varietal variation in chemical components. The results showed that sucrose, glucose, alanine, arginine, asparagine, malic acid and gingerol are important factors for the classification of the ginger.
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