Study on the Effects of Processes on Aroma Compounds in Rizhao Green Tea Based on the Gas Chromatography-Ion Mobility Spectrometry

Figure 2

Multivariate statistical analyses of Rizhao green tea at different processing stages. (a) PCA score plot, (b) PLS-DA score plot, (c) OPLS-DA score plot, (d) cross-validation plot of the OPLS-DA model with 200 permutation tests, and (e) Euclidean distance of tea samples.

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