Ultrasonic-Assisted Extraction of Procyanidins Using Ionic Liquid Solution from Larix gmelinii Bark

Table 1

Comparison of ILUAE with other extraction methods, mean ± S.D. (𝑛=3).

Number	Solvent	Extraction method	Time	Solvent consumption	Temperature	Extraction efficiency^a  ±; SD (%)
			(h)	(mL g^−1)	(°C)
1	Pure water	UAE	0.5	10	25	19.62 ± 0.76
2	1.25 M NaCl	UAE	0.5	10	25	17.47 ± 0.85
3	80% ethanol	UAE	0.5	10	25	67.10 ± 3.21
4	80% ethanol	ME	24.0	10	25	49.92 ± 2.51
5	80% ethanol	HRE	4.0	10	85	54.89 ± 2.66
6	1.25 M [Bmim] Br	UAE	0.5	10	25	100.00 ± 4.89

^aThe extraction efficiency is expressed as the observed values of procyanidins, and the maximum amount in each curve was taken to be 100%.