Table 2.

Percent enantiomeric composition (EC%) of some representative markers in genuine and adulterated bergamot (commercial bergamot EO: CB-1 EO), lavender (commercial lavender EO: CL-1 EO) and TTO (commercial tee tree oil: CT-1 EO) EO compared to the literature data (n = 20).

			Bergamot EO			Lavender EO
	Itsexp	Itslit	Genuine	Adulterated CB-1 EO	Reference Values [15]	Genuine	Adulterated CL-1 EO	Reference Values [1]
(R)-(−)-linalool	1181	1174	99.6	76.0	99.4–99.7	93.8	66.4
(S)-(+)-linalool	1196	1189	0.4	24.0	0.3–0.6	6.2	33.6	max 12%
(R)-(−)-linalyl acetate	1233	1231	99.7	89.1	99.7–99.9	99.4	80.4
(S)-(+)-linalyl acetate	1243	1237	0.3	10.9	0.1–0.3	0.6	19.6	max 1%
			Chinese TTO			Australian TTO
	Itsexp	Itslit	Genuine			Genuine	Adulterated CT-1 EO	Reference Values [16,17]
(R)-(−)-4-terpineol	1258	1253	57.8			30.8	45.5
(S)-(+)-4-terpineol	1250	1248	42.2			69.2	54.5	67.4–69.6
(R)-(+)-α-terpineol	1317	1309	77.0			75.8	76.7	71.0–78.0
(S)-(−)-α-terpineol	1302	1296	23.0			24.2	23.3