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  • 1
    Electronic Resource
    Electronic Resource
    Planarity selectivity in supercritical fluid and liquid chromatography using octadecylsilane-modified silicas with carbon dioxide (1992)
    Springer
    Chromatographia 34 (1992), S. 121-124 
    Details
    ISSN: 1612-1112
    Keywords: Supercritical fluid chromatography ; Column liquid chromatography ; Microbore columns ; Octadecylsilyl silica ; Selectivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The influence of column temperature and pressure on the planarity selectivity of encapsulated and polymeric octadecylsilane-modified silicas was examined using carbon dioxide mobile phase in supercritical fluid and liquid chromatography. The use of liquid carbon dioxide was found to enhance remarkably the molecular planarity recognition capability of the polymeric stationary phase compared with supercritical conditions. The influence of pressure and temperature on selectivity was seen to be significant with the polymeric phase but less with the encapsulated. It seems that pressure and temperature change the morphology of the polymeric phase to a greater extent than the encapsulated one.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02276123
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  • 2
    Electronic Resource
    Electronic Resource
    Refractive index detection in microbore column liquid chromatography (1986)
    Springer
    Chromatographia 22 (1986), S. 91-94 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Microbore columns ; Refractive index detection ; Reversed-phase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary An existing commercial refractive index detector was modified for use with microbore column LC systems. The detector utilizes the Fresnel method. The effect of band dispersion and dilution at the detector side is of extreme importance in connection with the miniaturized LC system. In the modified model the original heat-exchanger tube was removed and a stainless steel capillary was used for heat-exchanging. Gaskets having different cell volumes were also examined with respect to band broadening and sensitivity. The detection limit was 10ng for di-n-pentyl phthalate. The examples include the detection of phthalates, alcohols, n-paraffins, and kerosine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02257306
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  • 3
    Electronic Resource
    Electronic Resource
    Chromatographic performance of deuterated solvents in reversed phase micro high performance liquid chromatography (1982)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 5 (1982), S. 364-367 
    Details
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Microbore columns ; Reversed phase mode ; Separation factor for aromatics enhanced by ca. 30% with D2O in place of H2O ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The chromatographic performance of the deuterated solvents, CD3OD and D2O, has been investigated in reversed-phase micro high performance liquid chromatography. The chromatographic performance of CD3OD is only slightly superior to that of CH3OH. However, the performance of D2 is significantly superior to that of H2O, separation of aromatics being improved by about 30%. D2 is a particularly powerful solvent for the separation iof deuterated and non-deuterated compounds.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240050706
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