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

Table 4

Hamlin late asymptomatic versus symptomatic compound concentration.

Compound	concentration (ppm)	concentration (ppm)	value	Difference
α-Pinene	4757	4655	0.041	1.9%
β-Myrcene	12216	13601	0.720	3.6%
Linalool	447	242	<0.0	45.9%
Citronellal	648	725	<0.0	10.6%
Decanal	1302	716	<0.000	45.0%
Citronellol	128	123		3.9%
Neral	438	231	<0.0	47.2%
Carvone	45.6	33.5	<0.0	26.5%
2-Decenal		nd	nd	nd
Geranial	650	386	<0.000	40.6%
Perillaldehyde	122	115	0.020	5.7%
2,4-Decadienal	nd	nd	nd	nd
Citronellyl acetate	50.2	57.5	0.003	12.7%
α-Terpinyl acetate	55.1	62.7	0.009	12.1%
Dodecanal	875	795	0.0006	9.1%

= huanglongbing asymptomatic samples; = huanglongbing symptomatic samples; differences at α ≤ 0.01; = not detected.