title: Performance of wide-pore silica- and polymer-based packing materials in polypeptide separation: effect of pore size and alkyl chain length.
abstract: The effects of pore size and alkyl chain length of silica- and polymer-based packing materials in the elution of polypeptides with an acetonitrile gradient in the presence of trifluoroacetic acid were studied. Considerable differences were found in the performance of alkylsilylated phases prepared from various wide-pore silica particles assumed to have 30-50-nm pores. The pore size of such silica gels was found to be the critical factor in determining the efficiency for high-molecular-weight polypeptides. Silica C18 phases having small pore volumes below 20 nm pore diameter showed comparable performances to C4 and C8 phases for polypeptides with molecular weights of up to 80,000, and were more stable. Polymer-based packing materials with adequate pore size provided excellent column efficiencies and recoveries for polypeptides with higher chemical stabilities than silica-based materials.
authors.affiliation: Kyoto Institute of Technology, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Tanaka
authors.forename: K
authors.initials: K
authors.lastname: Kimata
authors.forename: Y
authors.initials: Y
authors.lastname: Mikawa
authors.forename: K
authors.initials: K
authors.lastname: Hosoya
authors.forename: T
authors.initials: T
authors.lastname: Araki
authors.forename: Y
authors.initials: Y
authors.lastname: Ohtsu
authors.forename: Y
authors.initials: Y
authors.lastname: Shiojima
authors.forename: R
authors.initials: R
authors.lastname: Tsuboi
authors.forename: H
authors.initials: H
authors.lastname: Tsuchiya
mesh_terms: D000097:Acetonitriles; D000478:Alkylation; D002853:Chromatography, Liquid / Q000379:methods*; D005782:Gels; D008970:Molecular Weight; D010455:Peptides / Q000032:analysis*; D011108:Polymers; D016062:Porosity; D012822:Silicon Dioxide
chemical_list: D000097:Acetonitriles; D005782:Gels; D010455:Peptides; D011108:Polymers; D012822:Silicon Dioxide; C032159:acetonitrile