Quality Assessment of Different Species and Differently Prepared Slices of Zedoray Rhizome by High-Performance Liquid Chromatography and Colorimeter with the Aid of Chemometrics

Table 1

Optimization of extraction conditions.

Analytes	Extraction methods (%)		Extraction solvents (%)				Extraction time (%)
	Sonication	Reflux	Methanol	80% aqueous methanol	60% aqueous methanol	Ethanol	30 min	45 min	60 min
Curcumenol	0.87	0.36	0.87	0.87	0.46	0.60	0.82	0.87	0.71
Curzerene	0.21	0.07	0.20	0.19	0.10	0.11	0.20	0.22	0.19
Curdione	1.96	1.22	1.96	0.61	0.58	1.66	1.86	1.96	0.88
Isourecumenol	0.73	0.40	0.69	0.38	0.32	0.68	0.74	0.74	0.38
Furanodienon	0.50	0.23	0.51	0.42	0.17	0.16	0.48	0.50	0.43
Curcumol	1.14	1.03	1.14	1.14	1.00	1.03	0.96	1.13	1.04
Germacrone	1.46	1.42	1.46	1.45	1.13	1.42	1.33	1.46	1.42
Furanodiene	0.25	0.20	0.25	0.23	0.17	0.21	0.14	0.25	0.21
β-Elemene	0.21	0.17	0.21	0.19	0.16	0.18	0.13	0.21	0.18
Bisdemethoxycurcumin	0.11	0.10	0.11	0.10	0.04	0.10	0.06	0.11	0.10
Demethoxycurcumin	0.37	0.35	0.37	0.37	0.18	0.36	0.30	0.36	0.35
Curcumin	0.20	0.19	0.20	0.19	0.09	0.19	0.15	0.20	0.19