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. 2023 Oct 31;12(11):1943. doi: 10.3390/antiox12111943

Figure 4.

Figure 4

Score plot of the first two components obtained by PCA performed with data obtained from total phenol (TPC) and flavonoid (TFC) content, antioxidant activity (ORAC, ABTS, FRAP), and UV-Vis absorption analysis from 200 to 500 nm of the cold tea brews. The type of tea (a) and the cultivar (b) were used as passive variables to represent confidence ellipses corresponding to the 80% confidence interval. The samples are coloured depending on the passive variable (filled dot).