Deep Eutectic Solvents (DESs)-Ultrasonic-Assisted Extraction of Paeoniflorin and Paeonol from Moutan Cortex

Table 1

Different types of DESs.

No.	HBA	HBD	Molar ratio	Extraction efficiency mg/g
				Paeoniflorin	Paeonol	Total
1	Choline chloride	Maltose	1 : 1	4.030	4.037	8.067
2		Malic acid	1 : 1	1.971	2.698	4.669
3		Lactic acid	1 : 2	4.460	4.720	9.180
4		Fructose	1 : 1	2.567	2.686	5.253
5		Glycerol	1 : 2	4.330	4.545	8.875
6		Propylene glycol	1 : 2	4.105	4.627	8.732
7		Xylitol	1 : 1	1.500	2.076	3.576
8		Urea	1 : 2	4.689	4.087	8.776
9		Acetic acid	1 : 2	4.110	4.920	9.030
10		Citric acid	1 : 2	2.796	3.835	6.630