title: Polyamidoamine-grafted silica nanoparticles as pseudostationary phases for capillary electrochromatographic separation of proteins.
abstract: Polyamidoamine-grafted silica nanoparticles were synthesized, characterized and investigated for the feasibility as pseudostationary phases in alkaline buffer for separation of cationic and anionic proteins, viz., lysozyme, cytochrome C, gamma globulin, and myoglobin. Neither bare silica nanoparticles nor polyamidoamines nor their mixtures as pseudostationary phases could lead to simultaneous separation of the four proteins. However, polyamidoamine-grafted silica nanoparticles not only suppressed the irreversible wall adsorption of the cationic lysozyme and cytochrome C, but also provided selectivity toward all the proteins. We found that polyamidoamine generation two-modified silica nanoparticles were the optimum pseudostationary phases with respect to detection sensitivity and separation efficiency; presence of the nanoparticles at 0.01% in the running buffer of 12.5 mM tetraborate/phosphate at pH 9.1 resulted in baseline resolution of the four proteins.
authors: College of Chemistry, Beijing Normal University, Beijing, China.
authors: Jingjie
authors: J
authors: Gao
authors: Nurgul
authors: N
authors: Latep
authors: Ying
authors: Y
authors: Ge
authors: Jing
authors: J
authors: Tian
authors: Jingqing
authors: J
authors: Wu
authors: Weidong
authors: W
authors: Qin
mesh_terms: D000327:Adsorption; D000818:Animals; D053801:Capillary Electrochromatography / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D053758:Nanoparticles / Q000737:chemistry*; D011073:Polyamines / Q000737:chemistry*; D011506:Proteins / Q000737:chemistry / Q000302:isolation & purification*; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: C531249:Poly(amidoamine); D011073:Polyamines; D011506:Proteins; D012822:Silicon Dioxide