Table 5.

Analytical results of the robustness of the method.

Components	Mean ± SD of peak area	RSD (%)
Chrysophanol-8-O-β-D-glucoside	586,544 ± 3,944	0.67
Emodin-8-O-β-D-glucoside	975,405 ± 3,021	0.31
Aloe-emodin-3-(hydroxymethyl)-O-β-D-glucoside	76,240 ± 568	0.75
Physcion-8-O-β-D-glucoside	376,999 ± 1,105	0.29
Aloe-emodin	429,562 ± 8,048	1.87
Rhein	760,992 ± 11,225	1.48
Emodin	712,528 ± 8,988	1.26
Chrysophanol	1,886,078 ± 29,245	1.55
Physcion	364,090 ± 5,181	1.42