Volatile Composition and Enantioselective Analysis of Chiral Terpenoids of Nine Fruit and Vegetable Fibres Resulting from Juice Industry By-Products

Table 5

Chiral markers, calculated LRI, and corresponding enantiomeric ratios for orange and tangerine fibres.

Chiral marker	Configuration^3	LRI	Orange flesh	Tangerine flesh	Orange peel	Tangerine peel	Literature data [19]
			α-Pinene^2	S	929	7.6–17.8		13.4	11.7	14.5	9.9–0.6
R	936	92.4–82.2		86.6	88.3	85.5	90.1–99.4
Camphene^2	S	949			29.2	25.4
	R	964			70.8	74.6
β-Pinene^2	R	975	6.5–12.6	6.1	46.2	49.3	10.6–70.2
	S	978	93.5–87.4	93.9	53.8	50.7	89.4–29.8
Limonene^1	S	1056	0.6–0.8	0.6	0.5	0.6	0.0–1.1
	R	1072	99.4–99.2	99.4	99.5	99.4	100–98.9
Linalool^1	R	1175	9.7–20.4	16.4	8.1	11.3	2.2–17.9
	S	1190	90.3–79.6	83.6	91.9	88.7	97.8–82.1
Terpinen-4-ol^2	S	1319	42.9–51.1	28.9	55.7	57.8	65.3–71.5
	R	1327	57.1–49.9	71.1	44.3	42.1	34.7–28.5
α-Terpineol^1	R	1296	30.6–42.1	41.5	22.7	48.3	5.1–15.7
	S	1309	69.4–57.9	58.5	77.3	51.7	94.9–84.3
Carvone^2	R	1346	32.2–41.3	34.9	30.3	26.5	40.7
	S	1352	67.8–58.7	65.1	69.7	73.5	59.3
α-Terpinyl acetate^2	X	1378			21.0	73.5
	Y	1381			79.2	26.5

and enantiomeric ratios calculated using diEt-CD column.
²LRI and enantiomeric ratios calculated using Pentyl-CD column.
and were used to indicate that the absolute configuration of the enantiomers could not be determined.