Study on the Preparation of Streptomycin Imprinted Polymers on the Surface of Silica Micro and Nano Spheres
| Autor: | Guo Min Wang, Mei Yang, Zhi Fei Li, Huan Bao Fa, Chang Jun Hou, Junjie Li, Xian Liang Li, Dan Qun Huo |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
Mechanical Engineering Polymer Tetraethyl orthosilicate chemistry.chemical_compound Polymerization chemistry Chemical engineering Mechanics of Materials Organic chemistry General Materials Science Veterinary drug Solid phase extraction Selectivity Molecular imprinting Sol-gel |
| Zdroj: | Key Engineering Materials. :920-925 |
| ISSN: | 1662-9795 |
| Popis: | The integration of molecular imprinting technique and solid-phase extraction (SPE) implements an effective alternative for sample pre-concentration in the determination and analysis of veterinary drug/pesticide residues. Herein, we reports a preliminary study on the preparation of streptomycin imprinted polymers on the surface of silica micro-spheres (with an average size of 50μm) and nano-spheres (with an average size of 500nm) via sol gel method. A mixed solution of tetrahydrofuran, ethanol and water (volume ratio is 7:1:1) was choose as dispersion agent, 3-aminopropyltriethoxysilane and phenyltriethoxysilane as functional monomers, and tetraethyl orthosilicate as cross-linker, while ammonia solution served as catalyst in the polymerization process. Scanning electron microscopic characterization was employed, suggesting that activating time exerts important influences on the morphology of activated silica micro-spheres, and also resultant molecular imprinted polymers (MIPs). The absorption capacity and selectivity of the obtained two MIPs were also evaluated for streptomycin and its analogue compounds in water samples. The results illustrate that the streptomycin-imprinted silica micro-spheres (MMIP) exhibited both larger absorption capacity and higher selectivity than those of silica nano-spheres (NMIP). The variant analytical performance might result from inadequate polymerization on the surface of silica nano-spheres. |
| Databáze: | OpenAIRE |
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