title: High-performance liquid chromatographic stationary phases based on poly(methyloctylsiloxane) immobilized on silica. II. Chromatographic evaluation.
abstract: This work describes the chromatographic characterization of stationary phases prepared by deposition of poly(methyloctylsiloxane) (PMOS) on silica followed by immobilization using one of several different processes: thermal treatments (120 or 220 degrees C for 4 h), microwave irradiation (495 W for 15 min), gamma radiation (dose of 80 kGy) or self-immobilization. This evaluation was based on the chromatographic parameters of several test solutes. The stationary phases immobilized at 220 degrees C and which underwent self-immobilization were not appropriate for chromatographic use but the other immobilized phases presented chromatographic performances similar in most respects to a commercial phase (Rainin C8) while the peak characteristics of the basic probe were significantly better with these phases.
authors.affiliation: Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, CEP 13083-970 Campinas, SP, Brazil.
authors.forename: Edivan
authors.initials: E
authors.lastname: Tonhi
authors.forename: Kenneth E
authors.initials: KE
authors.lastname: Collins
authors.forename: Carol H
authors.initials: CH
authors.lastname: Collins
mesh_terms: D002244:Carbon / Q000737:chemistry; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002851:Chromatography, High Pressure Liquid; D005720:Gamma Rays; D007202:Indicators and Reagents; D008872:Microwaves; D011108:Polymers / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry; D012833:Siloxanes / Q000737:chemistry*; D012997:Solvents; D013696:Temperature
chemical_list: D007202:Indicators and Reagents; D011108:Polymers; D012833:Siloxanes; D012997:Solvents; C475630:poly(methyloctylsiloxane); D002244:Carbon; D012822:Silicon Dioxide