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Abstract: A molecularly imprinted inorganic-organic hybrid monolithic capillary column (MIP hybrid monolith) was synthesized by one-pot process and its application in selective recognition and capture of lysozyme (Lyz) from complex biological samples was described for the first time. Due to a combination of rigid silica matrices and flexible organic hydrogels in one-pot process, stable and accessible recognition sites in the as-prepared MIP hybrid monolith could be obtained after the removal of template protein, which facilitated the rebinding of template and provided good reproducibility and lifetime of use. The morphology, permeability, and pore properties of the as-prepared MIP hybrid monolith were characterized and a uniform monolithic matrix with high surface area and large through-pores was observed. The recognition behavior of MIP and non-imprinted (NIP) hybrid monolith was evaluated by separating template protein from unfractionated protein mixture and the result indicated that the MIP hybrid monolith has much higher affinity toward the template protein than NIP hybrid monolith. High imprinted factor (IF) and separation efficiency could be obtained. In addition, the practicality of the Lyz-MIP hybrid monolith was further evaluated by selective separation of Lyz from egg white and capture of Lyz from human serum by adopting it as an in-tube solid phase microextraction (in-tube SPME), and the good results demonstrated its potential in proteome analysis
Template and target information: protein, lysozyme
Author keywords: One-pot process, molecular imprinting, Hybrid monolithic column, Recognition, lysozyme