Hydroxy-dibenzo crown ether stationary phase for capillary gas chromatography using sol-gel technology.
A new kind of crown ether, OH-dibenzo-14-crown-4 (OH-DB14C4), is prepared and coated onto the fused silica capillary by sol-gel process. Chromatographic characteristics including column efficiency (> 3,000 plates/m), thermal stability (to 330 degrees C) and ability of deactivation are studied. The selectivity of new stationary phase is superior to sol-gel OH-terminal silicone oil (OH-TSO) for positional isomers of some aromatic compounds such as xylene, dichlorobenzene, nitrotoluene, nitrochlorobenzene. The new stationary phase has high sample capacity for separation of small molecular mass compounds: low-molecular-mass alcohols, ethers and ketones, short-chain fatty acids and volatile amines.
Zeng
Z R
ZR
Department of Chemistry, Wuhan University, Wuhan 430072, China. zrzeng@whu.edu.cn
Qiu
W L
WL
Xing
H
H
Zhou
J H
JH
Huang
Z F
ZF
D002849:Chromatography, Gas / Q000295:instrumentation* / Q000379:methods; D004988:Ethers, Cyclic; D005782:Gels; D013237:Stereoisomerism; D014992:Xylenes / Q000737:chemistry / Q000302:isolation & purification*
D004988:Ethers, Cyclic; D005782:Gels; C476289:OH-dibenzo-14-crown-4; D014992:Xylenes