Fig. 2. 2D in A chemometric assessment of essential oil variation of three Salvia species indigenous to South Africa

Fig. 2. 2D-GC contour plots of A) S. africana-lutea, B) S. lanceolata and C) S. chamelaeagnea essential oils, with the different classes of compounds and some specific compounds indicated. The complete separation of β-caryophyllene and terpinen-4-ol achieved is evident. 1D column – Stabilwax, 30 m × 0.25 mm i.d. x 0.25 μm film thickness, 2D column – Rxi 5Sil MS, 1 m × 0.25 mm ID x 0.25 μm film thickness.Published as part of Tock, M.J. Lim Ah, Kamatou, G.P.P., Combrinck, S., Sandasi, M. & Viljoen, A.M., 2020, A chemometric assessment of essential oil variation of three Salvia species indigenous to South Africa, pp. 1-13 in Phytochemistry (112249) 172 on page 7, DOI: 10.1016/j.phytochem.2019.112249, http://zenodo.org/record/829427