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  • 1
    Electronic Resource
    Electronic Resource
    Retention prediction of substituted phenols in reversed-phase HPLC (1988)
    Springer
    Chromatographia 25 (1988), S. 515-519 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Retention/structure relationships ; Retention prediction ; Substituted phenols
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A retention prediction system (RPS) for substituted phenols in reversed-phase HPLC using a ternary mobile phase was investigated. The RPS was used to predict the retention times of the phenols, and then evaluated by comparing measured and predicted retention data. Excellent agreement between both values was obtained. In addition, the retention mechanism of the phenols was investigated by means of a correlation analysis relating the parameters of the RPS to the physicochemical properties of the phenols. The three properties investigated (partition coefficient, hydrophobic substituent constant and Hammett's constant) were used to describe quantitatively the structure-retention relationship. Significant correlating equations between these descriptors and the retention data were obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02324824
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Reversed-phase high performance liquid chromatographic separation of nitrosamines: The use of the overlapping resolution mapping technique for the optimization of solvent compositions (1993)
    Springer
    Chromatographia 35 (1993), S. 671-674 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Nitrosamines ; Overlapping resolution mapping ; Systematic optimization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary This paper describes the overlapping resolution mapping procedure to determine optimum solvent compositions in the reversed-phase high performance liquid chromatography of nitrosamines. The procedure is successful in enabling the satisfactory resolution of all eight nitrosamines, some of which are listed as priority pollutants by the United States Environmental Protection Agency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02267935
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Porous graphitic carbon (PGC) high-performance liquid chromatography of diphosphine-bridged complexes with heteronuclear Au-M (M=Mn, Re) bonds (1997)
    Springer
    Chromatographia 44 (1997), S. 381-385 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Porous graphitic carbon ; Diphosphine complexes ; Gold, rhenium, manganese organometallics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The isocratic high-performance liquid chromatography of 1,1′-bis(diphenylphosphino)ferrocene (dppf), 1,1′-bis(diphenylphosphino)ruthenocene (dppr), bis(diphenylphosphino)methane (dppm) and triphenylphosphine (PPh3)-substituted heterometallic Au-Mn or Au-Re carbonyl complexes is reported. A column packed with PGC (porous graphitic carbon) was used after preliminary experiments had shown that silica- and bonded-phase (silica-based) stationary phases were unsatisfactory for separation. The PGC column exhibited unique selectivity for the complexes studied. The mobile phases used were water-acetonitrile, dichloromethanehexane and tetrahydrofuran-hexane. The retention behaviour of the compounds was governed by the polar character and size of molecules, and influenced by metal-metal bond polarity. Separation of isomorphous structures with different metallocenyl moieties was achieved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02466314
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    Paper (German National Licenses)
    Fulltext
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