SPE-UHPLC-FLD Method for the Simultaneous Determination of Five Anthraquinones in Human Urine Using Mixed-Mode Bis(tetraoxacalix[2]arene[2]triazine) Modified Silica as Sorbent

Table 3

Determination of anthraquinones in urine from five patients after oral rhubarb decoction.

Sample number	Aloe-emodin	Rhein	Emodin	Chrysophanol	Physcion
	g mL^−1
(1)	0.078	0.662	0.047	0.152	0.038
(2)	0.054	0.782	0.032	0.236	0.027
(3)	0.068	0.715	0.038	0.132	0.038
(4)	0.062	0.813	0.071	0.086	0.034
(5)	0.085	0.764	0.058	0.124	0.056