Extraction and Chromatographic Determination of Shikimic Acid in Chinese Conifer Needles with 1-Benzyl-3-methylimidazolium Bromide Ionic Liquid Aqueous Solutions

Table 3

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

Number	Solvent	Extraction method	Extraction time (min)	Extraction yield ± SD (mg/g)
1	Pure water	UAE	39	15.41 ± 0.56
2	Pure water	HRE	180	15.46 ± 0.49
3	80% ethanol	UAE	39	17.36 ± 0.65
4	80% ethanol	HRE	180	16.55 ± 0.75
5	0.5 mol/L NaBr	UAE	39	14.56 ± 0.72
6	0.5 mol/L [Bzmim]Br	UAE	39	18.85 ± 0.78