Preparation of Fe3O4 Magnetic Surface Imprinted Microspheres and the Ethyl Acetate Extract Flavonoids Raspberry Concentration of Active Ingredient AppliedYiHui Xie, WenTing Bai, YanHua Ding, YaJuan Ma and LiPing HuangMATEC Web Conf., 67 (2016) 06081DOI: https://doi.org/10.1051/matecconf/20166706081