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  • 1980-1984  (2)
  • Comparision of phases  (1)
  • Reaction detector  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Chromatographia 14 (1981), S. 227-233 
    ISSN: 1612-1112
    Keywords: Chemically bonded phases ; Non-polar RP ; Polar bonded groups ; Selectivity ; Comparision of phases
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Retention on non-polar chemically-bonded stationary phases depends on the silica carrier, the kind of bonded silane, the surface concentration of bonded alkyl groups and the number of surface silanol groups before and after chemical modification. The influence of carbon content of bonded phases, column temperature and how the eluent mixture has been prepared on solute retention is demonstrated. For comparison of different bonded phases standardization for the amount of bonded carbon per unit column volume is recommended. The problems in attributing specific selectivities to different functional groups in chemically bonded phases are discussed. The advantages and specific selectivities of some phases with functional groups are demonstrated.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Chromatographia 15 (1982), S. 403-408 
    ISSN: 1612-1112
    Keywords: Liquid chromatography ; Reaction detector ; Colorimetric detection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A reaction detector with non-segmented flow in open tubes as reaction track is described. To minimize peak broadening the open tubes are arranged in a three dimensional coiled structure by knitting. At low volume flow rates the h-values in these open tubes are independent of flow rate and are significantly lower than predicted by theory. The applicability of this reactor for classical colorimetric detection with corrosive reagents is shown.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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