Calcium polyvinylpyrrolidone/alginate polymer microspheres (PVP/CA MIPMs) and calcium hydrolyzed polyvinylpyrrolidone/alginate polymer microspheres (PVP/CA MIPMs) macromolecularly imprinted hybrid polymer microspheres were firstly designed and prepared with sodium alginate (SA) and polyvinylpyrrolidone (PVP) by using CaCl2 as gelling agent in inverse-phase suspension. Morphology of BSA imprinted PVP-based hybrid polymer microspheres was observed by optical microscopy. The effect of the kind and quan...