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  • 1
    Electronic Resource
    Electronic Resource
    Retention prediction system coupled with a multichannel ultraviolet detector for the identification of polycyclic aromatic hydrocarbons (1985)
    Springer
    Chromatographia 20 (1985), S. 351-356 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Retention prediction system ; UV multichannel detector ; Polycyclic aromatic hydrocarbons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The retention prediction system assisted by a micro-computer coupled with an UV multichannel detector has been investigated in the separation of polycyclic aromatic hydrocarbons. The method offered very precise identification of components in NBS-SRM-1647 sample without any standard reference substances. It has been proven that the system makes very precise, non-pollutive and convenient environmental analysis possible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02269061
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  • 2
    Electronic Resource
    Electronic Resource
    Computer interactive identification system for polycyclic aromatic hydrocarbons in reversed-phase microcolumn liquid chromatography (1986)
    Springer
    Chromatographia 21 (1986), S. 622-626 
    Details
    ISSN: 1612-1112
    Keywords: Polycyclic aromatic hydrocarbons ; Reversed-phase liquid chromatography ; Computer interactive identification system ; Retention prediction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A computer interactive identification system is proposed which is based on the relationship between retention and molecular properties such as the size and shape of polycyclic aromatic hydrocarbons (PAHs). This system offers an automatic analytical process for liquid chromatography, providing a reliable identification of the separated components. The identification can be further enhanced by the use of multiple detectors such as a multichannel UV detector. The system can be used for optimization procedures, resulting in a highly automatic complex analytical system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02311915
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of stationary phase properties and solute molecular size on retention of PAHs in reversed-phase liquid chromatography (1984)
    Springer
    Chromatographia 18 (1984), S. 677-679 
    Details
    ISSN: 1612-1112
    Keywords: Polycyclic aromatic hydrocarbons ; Column liquid chromatography ; Polyphenyl bonded phases ; Retention and carbon content
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The relationship between the retention of PAHs having various molecular sizes and the carbon contents (%) of bonded stationary phases with various types of ligands were investigated. The examined stationary phases were phenyl, diphenyl, triphenyl and benzyl-bonded silicas. The data indicated that sometimes it is not true that the retention of any solute relates linearly to the carbon content of the stationary phase. As the result, it is suggested that the pore size distribution of the silica support, the bulkiness of the ligand bonded to the silica and the molecular size of solute should also be considered before any precise statement can be made.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02265813
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Retention prediction of polycyclic aromatic hydrocarbons in reversed phase liquid chromatography with various mobile phase compositions and column temperatures (1986)
    Springer
    Chromatographia 22 (1986), S. 13-18 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Mobile phase composition and column temperature ; Retention prediction ; Polycyclic aromatic hydrocarbons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The relationship between the logarithmic capacity factor measured in reversed-phase liquid chromatography and the operating conditions including the mobile phase composition and the column temperature is investigated. The strategy described herein can offer the possibility to predict the retention of polycyclic aromatic hydrocarbons without any experiments and standard materials, by utilizing equations describing the relationships between retention, temperature, mobile phase composition and physicochemical properties of the solutes previously stored in the program of the microcomputer-assisted retention prediction system. This concept is one of the most promising techniques for the optimization of the separation conditions in reversed-phase liquid chromatography.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02257289
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  • 5
    Electronic Resource
    Electronic Resource
    Compatibility and universality of the retention prediction system for polycyclic aromatic hydrocarbons in reversed-phase liquid chromatography (1986)
    Springer
    Chromatographia 21 (1986), S. 24-28 
    Details
    ISSN: 1612-1112
    Keywords: Column-liquid chromatography ; Retention prediction system ; Reversed-phase ; Compatibility ; Polycyclic aromatic hydrocarbons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary System-compatibility and universality of the retention prediction concept has been investigated for polycyclic aromatic hydrocarbons in reversed-phase liquid chromatography. The results clearly indicate that the retention prediction approach has a very high potential for optimization of separation conditions in almost all reversed-phase systems, and allows more precise and rapid analysis. This approach may be one of the best optimization techniques, because the system does not require any standard materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02310590
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  • 6
    Electronic Resource
    Electronic Resource
    Correlation between the retention data of polycyclic aromatic hydrocarbons and several descriptors in reversed-phase HPLC (1983)
    Springer
    Chromatographia 17 (1983), S. 445-449 
    Details
    ISSN: 1612-1112
    Keywords: Micro-HPLC ; Reversed-phase chromatography ; Polycyclic aromatic hydrocarbons ; Correlation between retention and descriptors ; Effect of the structure of stationary phase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The separation of polycyclic aromatic hydrocarbons (PAH) on various reversed-phase columns (phenyl, ethyl, octyl and octadecyl) have been compared. The correlations between the logarithm of capacity factor (log k′) and several descriptors, which show the molecular size, shape and physical property of a solute, were determined. The results indicated the high possibility to predict the retention of PAH in reversed-phase high performance liquid chromatography.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02262927
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Correlation between retention data of polycyclic aromatic hydrocarbons and several descriptors in supercritical-fluid chromatography (1986)
    Springer
    Chromatographia 21 (1986), S. 219-222 
    Details
    ISSN: 1612-1112
    Keywords: Supercritical-fluid chroamtography ; Polycyclic aromatic hydrocarbons ; Retention prediction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The correlation between retention data of polycyclic aromatic hydrocarbons (PAHs) obtained in various supercritical fluid-chromatographic systems (SFC systems) and several descriptors is investigated in order to determine the dominant factors controlling the retention. It is clear that the separation of PAHs in SFC is primarily controlled by the molecular size of the solute and its polarizability. The retention in SFC can be predicted with help of the equation derived by this study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02311890
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Molecular shape recognition capability of liquid-crystal bonded phases in reversed-phase high performance liquid chromatography (1994)
    Springer
    Chromatographia 38 (1994), S. 295-303 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Liquid crystal phases ; Molecular shape recognition ; Polycyclic aromatic hydrocarbons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The chromatographic retention behaviour of two liquidcrystal bonded phases have been evaluated using polycyclic aromatic hydrocarbons (PAHs) as the probe samples in reversed-phase high performance liquid chromatography (RP-HPLC). The results clearly indicate that these phases have better planarity and shape recognition capabilities than commercially-avaialble polymeric octadecylsilica (ODS) phases whose strong planarity and shape selectivities were found earlier. It can also be concluded from the chromatographic observations that the shape recognition capability of these phases is dependent on both mobile phase composition and column temperature, but that the effect of mobile phase and temperature on the shape selectivity work independently. The retention behaviour can be explained by changes in the phase structure with changes of eluent composition and temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02269771
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  • 9
    Electronic Resource
    Electronic Resource
    The influence of the pore size of bonded phases containing phenyl groups on the retention of polycyclic aromatic hydrocarbons in reversedphase liquid chromatography (1985)
    Springer
    Chromatographia 20 (1985), S. 242-248 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Phenyl bonded phases ; Effect of pore size on retention ; Polycyclic aromatic hydrocarbons ; Silica supports
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Differences in bonded phase properties were studied for triphenyl, diphenyl, phenyl and benzyl phases prepared on a variety of silicas. A total of six silicas with pore diameters ranging from 100 to 200 Å were used in the synthesis. The effect of the pore diameter of the silicas on the retention of polycyclic aromatic hydrocarbons are discussed. Differences in retention were observed as a function of pore size, but not much difference was observed with substrates having pore sizes larger than about 170Å. The observed phenomena are explained by two steric exclusion mechanisms, one during the bonding reaction, and the other in the chromatographic analysis. Statistical calculations were performed using the descriptors showing molecular size and/or shape. The results indicated that the difference between bulky phases and less bulky phases was only observed in the degree of shape-recognition ability of the solute while no differences exist in the retention mechanisms on the different phases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02259696
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  • 10
    Electronic Resource
    Electronic Resource
    The correlation between molecular polarizability of PAHs and their retention data on various stationary phases in reversed-phase HPLC (1984)
    Springer
    Chromatographia 18 (1984), S. 103-105 
    Details
    ISSN: 1612-1112
    Keywords: Liquid column chromatography (reversed phase) ; Inductive effect ; Dispersive effect ; Polycyclic aromatic hydrocarbons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The equation for the potential energy of interactions established for gas-liquid chromatography has been confirmed in reversed phase liquid chromatography. Equations derived for molecular polarizabilities of PAHs and their retention data have very high correlation coefficients. The results indicate that the inductive effect between solute and stationary phase is the main one and the dispersive effect is very small compared with the inductive effect but its contribution increases with the carbon chain length of the stationary phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02268467
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    Paper (German National Licenses)
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