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

Table 1

Major volatile compounds detected in pretreated sliced fresh yellow ginger rhizome.

Retention time (min)	Compound name	Fraction (%)
		Potassium metabisulfite concentration					Blanching temperature
		Control	0.10%	0.15%	1%	0.20%	50°C	100°C
8.69	α-Pinene					1.346
8.98	Camphene	0.008	2.644	2.139	1.786	5.178	0.029
10.85	α-(E)-Sabinene hydrate	0.015	4.136	3.417	3.706	6.196	0.050	0.099
15.16	Neral					1.351
15.18	cis-Z-α-bisabolene epoxide			1.235
15.19	2,6-Octadienal, 3,7-dimethyl (Z)						0.032
15.73	Geranial	0.008	2.647	2.231		3.156	0.037	0.052
15.74	Dill-apiole			2.298
21.99	α-Curcumene	0.014	4.192	32.920	4.294	16.827	0.488	0.665
22.18	Germacrene D		2.301				0.030	0.051
22.22	α-Cubebene	0.015			2.600	3.519
22.61	α-Zingiberene		32.983		13.935
22.62	Dihydro-α-curcumene	99.768			33.943	5.718		97.898
22.87	α-Farnesene	0.040	12.149	11.103			0.154	0.266
23.03	α-Bisabolene	0.040	5.885		8.089	10.686	98.821
23.07	α-Bisabolene			7.648
23.20	(+)-Epibicyclosesquiphellandrene				0.983
23.48	δ-Carene			15.441
23.52	α-Cedrene	0.046	15.614	4.171	16.213	21.543	0.201	0.159
24.75	γ-Gurjunene	0.006	0.945		0.723
26.17	Zingerone							0.037