High-performance liquid chromatographic stationary phases based on poly(methyloctylsiloxane) immobilized on silica. II. Chromatographic evaluation.
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.
Tonhi
Edivan
E
Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, CEP 13083-970 Campinas, SP, Brazil.
Collins
Kenneth E
KE
Collins
Carol H
CH
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
D007202:Indicators and Reagents; D011108:Polymers; D012833:Siloxanes; D012997:Solvents; C475630:poly(methyloctylsiloxane); D002244:Carbon; D012822:Silicon Dioxide