. 2020 Apr 3;9(4):298. doi: 10.3390/antiox9040298

Table 5.

The main components of C. × clementina peel essential oils.

Compounds	RI¹	Relative Amount (%)			I.M²	Sign.
		BC6	BR6	BO6
α-Pinene	938	1.10 ± 0.12^c	1.55 ± 0.21^b	3.13 ± 0.33^a	1,2,3	**
Sabinene	973	2.55 ± 0.70^a	0.97 ± 0.12^c	1.52 ± 0.21^b	1,2,3	**
β-Pinene	980	tr	tr	tr	1,2,3	**
Myrcene	993	3.56 ± 0.31^c	4.94 ± 0.46^b	9.10 ± 0.91^a	1,2,3	**
+/- Limonene	1030	75.11± 4.55^b	83.09 ± 5.12^a	61.31 ± 4.02^c	1,2,3	**
(E)- β-Ocimene	1049	3.31 ± 0.37^a	nd	nd	1,2	**
γ-Terpinene	1057	0.33 ± 0.03^a	tr	0.32 ± 0.03^a	1,2,3	**
Terpinolene	1086	tr	tr	0.30 ± 0.03^a	1,2,3	**
Linalool	1098	5.30 ± 0.55^b	3.29 ± 0.36^c	6.64 ± 0.61^a	1,2,3	**
Nonanal	1100	1.84 ± 0.23^b	1.62 ± 0.24^c	3.64 ± 0.34^a	1,2	**
Citronellal	1148	0.40 ± 0.04^b	tr	0.75 ± 0.07^a	1,2	**
Terpinen-4-ol	1176	0.56 ± 0.05^b	0.20 ± 0.02^c	0.88 ± 0.08^a	1,2	**
α-Terpineol	1189	0.47 ± 0.04^b	0.49 ± 0.04^b	1.55 ± 0.12^c	1,2,3	**
Decanal	1205	1.05 ± 0.10^b	1.04 ± 0.10^b	2.20 ± 0.21^a	1,2	**
trans-Caryophyllene	1415	tr	tr	tr	1,2,3	**
trans-β-Farnesene	1441	tr	tr	0.35 ± 0.03^a	1,2	**
α-Humulene	1454	tr	tr	tr	1,2,3	**
δ-cadinene	1526	0.31 ± 0.02^a	0.22 ± 0.02^c	0.26 ± 0.02^b	1,2	**
β-Sinensal	1697	0.29 ± 0.02^a	tr	0.13 ± 0.02^b	1,2	**
α-Sinensal	1750	0.70 ± 0.07^a	0.37 ± 0.04^c	0.45 ± 0.05^b	1,2	**
Total identified		96.88	97.78	92.53

BC6: Peel EO from Cetraro; BR6: Peel EO from Rosarno; BO6: Peel EO from Corigliano Calabro. Data are reported as the mean ± standard deviation (n = 3). ¹RI: Retention indices on the HP 5MS column. ²IM, identification method: 1—comparison of retention times; 2—comparison of mass spectra with MS libraries, 3—comparison with authentic compounds; tr: trace (<0.1%). Differences were evaluated by one-way analysis of variance (ANOVA) completed with a multicomparison Tukey’s test. **p < 0.05. Means in the same row with different small letters differ significantly (p < 0.05). nd: not detected.