Polymeric ionic liquid modified organic-silica hybrid monolithic column for capillary electrochromatography.
A polymeric ionic liquid (PIL) modified hybrid monolithic column for CEC was synthesized on the basis of mercaptopropy-functionalized (MP-silica) hybrid monolithic column which was prepared by the in situ co-condensation of tetramethoxysilane and 3-mercaptopropyltrimethoxysilane via a sol-gel process. The PIL modified (PImC₈-silica) hybrid monolithic column, which was characterized by FT-IR and X-ray Photoelectron spectroscopy (XPS), generated a strong reversed and relatively stable EOF in a wide range of pH (3.0-8.0). The PImC₈-silica hybrid monolithic column was evaluated by the separation of three aromatic hydrocarbons (AHs), four alkylbenzenes and five phenols, respectively, with phosphate buffers containing different ratios of acetonitrile as mobile phase. Reproducibilities of the column were also investigated by measuring RSDs of the migration time for AHs. RSDs of run-to-run (n=5), day-to-day (n=3) and column-to-column (n=3) were in the range of 0.26-0.87%, 0.90-3.2% and 1.5-5.7%, respectively.
Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
Haifeng
H
Han
Qing
Q
Wang
Xia
X
Liu
Shengxiang
S
Jiang
D053801:Capillary Electrochromatography / Q000295:instrumentation* / Q000379:methods*; D006841:Hydrocarbons, Aromatic / Q000737:chemistry / Q000302:isolation & purification; D006863:Hydrogen-Ion Concentration; D052578:Ionic Liquids / Q000737:chemistry*; D017646:Organosilicon Compounds; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification; D011108:Polymers / Q000737:chemistry*; D015203:Reproducibility of Results; D012821:Silanes / Q000737:chemistry*
D006841:Hydrocarbons, Aromatic; D052578:Ionic Liquids; D017646:Organosilicon Compounds; D010636:Phenols; D011108:Polymers; D012821:Silanes; C061205:tetramethoxysilane; C102833:(3-mercaptopropyl)trimethoxysilane