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  • 1
    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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  • 2
    Electronic Resource
    Electronic Resource
    Capillary electrochromatography using columns packed with a supercritical fluid carrier (1996)
    Springer
    Chromatographia 43 (1996), S. 313-321 
    Details
    ISSN: 1612-1112
    Keywords: Capillary electrochromatography ; Detectors ; Columns ; Pharmaceuticals ; Polycyclic aromatic hydrocarbons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Columns for capillary electrochromatography may be prepared by packing reversed phase silica-based material using a supercritical fluid carbon dioxide carrier. Procedures for the in-situ manufacture of frits and UV detection windows, and the wetting of columns are described. The columns were employed in two commercial instruments (and a home-built system), and their properties investigated during the separation of standard mixtures of test compounds. The columns are highly efficient and durable, with reduced plate heights of 1.0–1.4. The repeatability of retention time, peak area and peak height was measured. The influence of applied voltage and column temperature and of electrokinetic injection parameters was explored, along with other practical considerations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02271002
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Dual capillary column supercritical fluid chromatography (1990)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 13 (1990), S. 22-26 
    Details
    ISSN: 0935-6304
    Keywords: Supercritical fluid chromatography ; Dual capillary columns ; Polycyclic aromatic hydrocarbons ; Hop and beer bitter acids ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A chromatograph equipped with one injection valve, two capillary columns with different selectivities, two flame ionization detectors and two electrometers is used to perform simultaneous dual capillary supercritical fluid chromatography. Two sets of retention times and indices are obtained for a mixture of polycyclic aromatic hydrocarbons, from one injection, enabling positive identification. The system is also used to rapidly select a stationary phase for separating hop and beer bittering acids.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240130106
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    “Short-end injection” rapid analysis capillary electrochromatography (1998)
    Springer
    Chromatographia 47 (1998), S. 135-140 
    Details
    ISSN: 1612-1112
    Keywords: Capillary electrochromatography ; Short-end injection ; Rapid analysis ; Voltage gradient ; Detached capillaries
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The analytical benefits of using “short-end injection” rapid analysis in capillary electrochromatography (CEC) have been demonstrated. These include extremely rapid analysis times, the potential for voltage gradients to be exploited, high hydrodynamic loadability and the convenience of using short detachable lengths of packed capillaries. “Short-end injection” rapid CEC has been demonstrated for the analysis of a standard neutral test mixture and three pharmaceutically active steroids. Extremely short analysis times were obtained due to the increased effective field strength experienced by the packed bed and the reduced length to the detector. In conjunction with an appropriate sampling rate, peak efficiencies in excess of 554,000 plates/metre (i.e. 41,500 plates per column) could be obtained. The repeatability of retention time and peak area compared favourably to that obtained using a conventional CEC approach.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02466572
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    Paper (German National Licenses)
    Fulltext
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