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  • 1
    Electronic Resource
    Electronic Resource
    Engineering for Increased Glass Production (1954)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 46 (1954), S. 172-174 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie50529a051
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Rapid separation of polycyclic aromatic hydrocarbons by packed column supercritical fluid chromatography (1994)
    Springer
    Chromatographia 39 (1994), S. 607-611 
    Details
    ISSN: 1612-1112
    Keywords: Supercritical fluid chromatography ; Column liquid chromatography ; Polycyclic aromatic hydrocarbons ; Environmental samples
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The separation in 6 minutes of the sixteen US Environmental Protection Agency (EPA) polycyclic aromatic hydrocarbons (PAHs) on a single packed column by supercritical fluid chromatography (SFC) is described and compared to that obtained using liquid chromatography with the same column. Several environmental samples containing polycyclic aromatic hydrocarbons obtained from various sources including soil, water, petrochemicals and coal have been analysed by SFC under optimised conditions. Packed column SFC is shown to be an efficient and promising method for the rapid monitoring of environmental polycyclic aromatic hydrocarbons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02268288
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of kinematic viscosity of the slurry on the packing efficiency of PEEK microbore columns for liquid chromatography (1995)
    Springer
    Chromatographia 40 (1995), S. 662-668 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Microbore columns ; Column packing ; Slurry viscosity ; Surfactants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The kinematic viscosity of the slurry used for the packing of microbore columns for liquid chromatography has been correlated with the packing efficiency. The columns were packed into polyetheretherketone (PEEK) tubing with an internal diameter of 0.5 mm using unbonded and bonded spherical silica gels under constant pressure conditions. Higher efficiencies were obtained using slurries suspended in aqueous solutions of surfactants, such as polyoxyethylene sorbitane monolaurte (Tween-20) and sodium dodecyl sulphate, in comparison with organic solvents usually used for column packing. The concentration dependencies of the relative kinematic viscosities of six slurries were compared using capillary viscometry. The slurries with low relative viscosities possessed rheological properties which enabled high packing densities, typical of a stable dense random packing arrangement, to be obtained at moderate packing pressures. The unusually low relative viscosities are discussed in terms of a “porous hydrodynamic bearing” model. The techniques used should also be generally applicable to the slurry packing of conventional columns.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02315134
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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