Table 1.

Selected potential markers.

	Marker Ion	Retention Time (min)	Mass to Charge Ratio (m/z)	Identification
Markers for fine root	Ion a	18.26	425.3798	Ginsenoside Rd
	Ion b	16.52	425.3784	Ginsenoside Rc
	Ion c	17.13	407.3690	Ginsenoside Rb2
	Ion d	15.94	425.3777	Ginsenoside Rb1
	Ion f	15.18	423.3632	Ginsenoside 20(S)-Rg2
Markers for Main root	Ion g	27.97	701.3853	gingerglycolipid B (1)
	Ion h	27.72	520.3447	unknown
	Ion k	29.60	496.3431	unknown
	Ion l	39.33	338.3435	13-cis-docosenamide (2)