title: Selectivity of electron-donor- and electron-acceptor-bonded silica packing materials for hydrophobic environmental contaminants in polar and non-polar eluents.
abstract: Electron-acceptor-bonded stationary phases, 2-(nitrophenyl)ethylsilyl (NPE) and 3-(p-nitrophenoxy)propylsilyl (NPO), and electron-donor-bonded phases, 3-(N-carbazolyl)propylsilyl (CZP), 2-(1-pyrenyl)ethylsilyl (PYE), and 5-coronenylpentylsilyl (COP), were prepared from silica particles and their selectivities were examined in both polar and non-polar solvents for specific isomers of polychlorodibenzo-p-dioxins (PCDDs), hexachloronaphthalenes (HxCNs) and planar and non-planar polychlorobiphenyl (PCB) congeners. Although no single stationary phase was able to separate all the isomer pairs that are coproduced during the synthesis of the PCDDs and HxCNs, pairs can be separated by selecting a suitable stationary phase and solvent. The separation of mixtures of PCDD isomers were found to be most successful with PYE and NPO phases, which yielded the opposite elution orders for each isomer pair that is produced as a mixture. Similar results were obtained for the HxCN isomers that were separated on PYE and CZP phases. The COP phase provided easier separation of non-ortho-substituted and mono-ortho-substituted PCBs from the other PCBs based on the planarity than PYE phase.
authors.affiliation: Department of Polymer Science and Engineering, Kyoto Institute of Technology, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kimata
authors.forename: K
authors.initials: K
authors.lastname: Hosoya
authors.forename: H
authors.initials: H
authors.lastname: Kuroki
authors.forename: N
authors.initials: N
authors.lastname: Tanaka
authors.forename: J R
authors.initials: JR
authors.lastname: Barr
authors.forename: P C
authors.initials: PC
authors.lastname: McClure
authors.forename: D G
authors.initials: DG
authors.lastname: Patterson
authors.forename: E
authors.initials: E
authors.lastname: Jakobsson
authors.forename: A
authors.initials: A
authors.lastname: Bergman
mesh_terms: D002851:Chromatography, High Pressure Liquid; D004583:Electrons; D004785:Environmental Pollutants / Q000032:analysis*; D006801:Humans; D012822:Silicon Dioxide / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D004785:Environmental Pollutants; D012822:Silicon Dioxide