Table 4. Predicted level of the optimum acetic acid soaking conditions for the maximized and minimized ginsenosides of taegeuk ginseng by the ridge analysis of their response surfaces

Ginsenosides		Acetic acid soaking conditions						Morphology
		Concentraion (%)		Soaking time (h)		Estimated response (mg/g)
		Maximum	Minimum	Maximum	Minimum	Maximum	Minimum
Protopanaxadiol ginsenosides	Rb1	13.48	13.90	0.52	3.27	3.69	1.49	Minimum point
	Rb2	18.99	13.12	0.69	4.06	2.22	0.72	Minimum point
	Rb3	16.65	13.34	0.53	4.27	0.27	0.10	Minimum point
	Rc	20.58	14.16	0.84	3.49	1.84	0.84	Minimum point
	Rd	14.33	15.56	0.50	2.67	0.35	0.12	Minimum point
	Rg3	22.74	6.53	3.77	3.56	0.46	0.03	Saddle point
Protopanaxatriol ginsenosides	Re	19.46	18.50	0.71	3.21	3.45	1.32	Minimum point
	Rf	17.92	14.53	0.59	3.29	1.16	0.46	Minimum point
	Rg1	14.23	10.94	0.51	3.64	2.69	1.28	Minimum point
	Rg2	21.24	20.59	0.94	3.64	0.49	0.13	Minimum point
	Rh1	24.19	7.50	3.29	3.82	0.24	0.02	Saddle point
Total ginsenosides		17.70	14.36	1.57	3.29	16.14	7.09	Minimum point