A Comparison of the Volatile Components of Cold Pressed Hamlin and Valencia (Citrus sinensis (L.) Osbeck) Orange Oils Affected by Huanglongbing

Table 2

Valencia oils linear retention indices and percent peak areas.

Compound	LRI (observed)	LRI (literature)	Early  % peak area	Relative standard deviation	Early  % peak area	Relative standard deviation	Late AS % peak area	Relative standard deviation	Late SY % peak area	Relative standard deviation	Identified
α-Thujene	922	928 [11]	trace	3.62	trace	3.45	trace	2.87	trace	3.00	MS, RI
α-Pinene	943	939 [11]	0.51	2.71	0.50	0.98	0.48	2.70	0.49	1.03	MS, ST, RI
Sabinene	975	972 [11]	0.11	5.09	0.13	4.72	0.10	4.46	0.14	3.90	MS, RI
β-Myrcene	995	992 [11]	1.20	2.57	1.22	1.55	1.21	2.35	1.21	0.39	MS, ST, RI
Octanal	1004	1006 [12]	1.06	2.77	0.99	2.90	0.97	2.06	0.95	2.87	MS, RI
δ-3-Carene	1023	1011 [12]	0.12	3.01	0.09	2.94	0.08	3.86	0.07	3.64	MS, RI
Limonene	1045	1033 [11]	95.7	2.30	96.0	1.54	95.9	2.01	96.0	0.15	MS, RI
β-Ocimene	1075	1056 [11]		—	0.01	2.96	0.03	2.91	0.03	0.35	MS, RI
γ-Terpinene	1083	1074 [11]	trace	2.11	trace	1.55	0.01	2.70	0.01	0.65	MS, RI
Terpinolene	1106	1091 [12]	0.01	2.21	0.01	1.58	0.01	2.32	0.01	0.08	MS, RI
Linalool	1110	1100 [11]	0.23	2.00	0.20	0.50	0.23	1.71	0.20	0.36	MS, ST, RI
Nonanal	1113	1104 [11]	0.03	1.72	0.03	2.62	0.04	1.41	0.04	1.31	MS, RI
Perillene	1142	1126 [11]	trace	3.88	trace	3.96	trace	2.08	trace	1.37	MS, RI
Limonene oxide	1150	1142 [11]	trace	1.61	0.01	1.42	trace	1.68	0.01	0.30	MS, RI
Citronellal	1161	1159 [11]	0.04	1.90	0.05	1.49	0.04	2.10	0.07	0.13	MS, ST, RI
1-Nonanol	1176	1171 [12]	trace	2.28	trace	3.06	0.01	4.14	trace	2.97	MS, RI
α-Terpineol	1196	1195 [11]	trace	1.06	trace	1.53	trace	6.76	trace	1.89	MS, RI
4-Decenal	1200	1200 [11]	trace	2.98	0.01	2.13	trace	4.65	trace	3.83	MS, RI
Decanal	1211	1209 [11]	0.29	1.82	0.21	1.44	0.29	1.63	0.23	0.07	MS, ST, RI
trans-Carveol	1217	1217 [11]	trace	2.39	trace	2.07	trace	3.43	trace	1.76	MS, RI
Citronellol	1233	1233 [11]	0.01	3.49	0.01	2.40	0.02	4.45	0.01	1.25	MS, ST, RI
Neral	1251	1247 [11]	0.07	1.73	0.06	1.69	0.06	1.77	0.05	0.21	MS, ST, RI
Carvone	1261	1255 [11]	0.01	2.03	0.01	4.15	0.01	2.50	0.01	0.52	MS, ST, RI
2-Decenal	1269	1262 [11]	trace	4.64	trace	5.83	trace	3.18	trace	3.00	MS, ST, RI
Geranial	1278	1277 [11]	0.11	1.66	0.09	1.53	0.09	1.59	0.08	0.15	MS, ST, RI
Perillaldehyde	1293	1279 [12]	0.02	1.12	0.03	2.07	0.02	2.54	0.03	0.33	MS, ST, RI
Undecanal	1311	1306 [12]	0.02	4.02	0.02	0.85	0.02	1.84	0.02	1.05	MS, RI
2,4-Decadienal	1327	1317 [11]	trace	6.89	trace	6.18	trace	4.12	trace	5.07	MS, ST, RI
Citronellyl acetate	1354	1357 [11]	trace	3.32	trace	6.67	trace	3.06	trace	3.55	MS, ST, RI
α-Terpinyl acetate	1366	1352 [11]	trace	6.00	trace	4.75	trace	3.23	trace	5.03	MS, ST, RI
α-Copaene	1385	1377 [11]	trace	2.11	trace	2.17	trace	1.84	trace	0.78	MS, RI
β-Cubebene	1398	1390 [12]	0.02	1.19	0.02	1.41	0.02	1.18	0.02	0.27	MS, RI
Dodecanal	1411	1407 [12]	0.07	5.72	0.06	5.88	0.07	4.00	0.07	3.61	MS, ST, RI
β-Longipinene	1413	1408 [13]	trace	4.58	trace	3.68	0.01	2.63	0.01	0.86	MS, RI
β-Caryophyllene	1446	1432 [12]	0.01	2.70	0.01	2.87	0.02	4.78	0.02	0.33	MS, RI
B-Humulene	1456	1454 [12]	0.03	6.18	0.02	4.29	0.03	4.90	0.02	2.24	MS, RI
α-Humulene	1461	1467 [11]	trace	4.99	0.01	6.77	trace	6.18	0.01	2.62	MS, RI
Germacrene-D	1484	1487 [11]	trace	1.57	trace	5.34	trace	4.36	trace	4.30	MS, RI
γ-Muurolene	1501	1499 [12]	trace	1.35	trace	3.92	trace	2.74	trace	0.59	MS, RI
Valencene	1510	1506 [12]	0.02	1.54	0.03	5.45	0.03	2.49	0.03	0.43	MS, RI
α-Farnesene	1523	1508 [12]	0.02	0.70	0.02	3.76	0.06	1.28	0.04	1.17	MS, RI
δ-Cadinene	1532	1524 [12]	trace	4.30	trace	2.93	nd	—	nd	—	MS, RI
α-Elemol	1546	1547 [11]	0.03	5.88	0.03	3.00	0.03	4.73	0.03	5.84	MS, RI
Caryophyllene oxide	1623	1581 [11]	trace	6.26	trace	5.74	0.01	3.73	0.01	6.25	MS
β-Sinensal	1715	1706 [11]	0.02	6.89	0.03	5.24	0.02	3.99	0.03	7.26	MS, RI
Farnesol	1756	1742 [12]	trace	1.19	trace	2.75	trace	4.06	trace	1.80	MS, RI
α-Sinensal	1766	1760 [12]	0.01	1.57	0.01	2.00	0.01	5.14	0.01	4.21	MS, RI

= huanglongbing asymptomatic samples, = huanglongbing symptomatic samples, “identified by,” MS = mass spectral library, ST = internal standard, RI = matching calculated retention index to literature value; = not detected for this sample.