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

Figure 2

Effects of the ionic liquids anions (a), cations (b), concentration of [Bzmim]Br (c), ultrasound time (d), ultrasound power (e), and liquid-solid ratio (f) on the extraction yield of shikimic acid.

(a)

(b)

(c)

(d)

(e)

(f)