Effects of Pretreatment and Drying on the Volatile Compounds of Sliced Solar-Dried Ginger (Zingiber officinale Roscoe) Rhizome

Table 3

Major volatile compounds detected in pretreated sliced open-sun dried yellow ginger rhizome.

Retention time (min)	Compound name	Fraction (%)
		Potassium metabisulfite concentration					Blanching temperature
		Control	0.10%	0.15%	0.20%	1%	50^oC	100^oC
8.69	α-Pinene
8.98	Camphene	2.1371	0.003	4.292	5.547	0.003	1.333	0.003
10.89	trans-4-Thujanol	4.1767	5.338	5.893	8.300	0.006	1.992	4.866
15.16	Neral	0.0014
15.19	2,6-Octadienal, 3,7 -dimethyl (Z)		0.002				0.001	0.001
15.55	Borneol
15.73	Geranial	2.6124	0.003	0.003	0.004	0.003	0.001	0.002
21.99	α-Curcumene	5.9455	6.917	6.052	9.391	0.009	2.656	5.681
22.18	Germacrene D				0.004			0.003
22.22	α-Cubebene	2.7886	0.003	0.003		0.004	1.149
22.61	1,3, 6,10-Dodeca tetraene,3, 7,11-trimethyl (Z, E)-			40.171
22.61	α-Zingiberene	39.641
22.62	Dihydro-α-curcumene		41.941		6.326	58.085	17.546	42.915
22.87	α-Farnesene	15.57	16.653	15.126	25.222	0.023	62.812	16.487
23.03	α-Bisabolene	9.3904	10.091	9.633	15.520	14.397	4.250	10.215
23.52	α-Cedrene	17.72	19.032	18.813	29.651	27.440	8.252	19.811
36.52	Caryophyllene oxide				0.004	0.002