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  • 1
    Electronic Resource
    Electronic Resource
    Use of non-segmented flow, post-columns reaction detection with miniaturized HPLC systems (1983)
    Springer
    Chromatographia 17 (1983), S. 125-131 
    Details
    ISSN: 1612-1112
    Keywords: Miniaturized HPLC ; Post-column reaction detection ; Catecholamines ; Packed-bed reactors ; Non-segmented open-tubular reactors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The use of non-segmented flow, post-column reaction detection is evaluated for use with miniaturized HPLC. Non-segmented open-tubular reactors with internal diameters 0.1 mm to 0.25 mm and packed-bed reactors with internal diameters of 1 mm, filled with 5 and 10 μm particles are evaluated theoretically and experimentally with respect to band broadening and pressure drop characteristics. An integrated system consisting of miniaturized HPLC (1 mm i. d.) columns and compatible hardware is described. An example of the separation of catecholamines is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02271034
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Photochemical reaction detection of phylloquinone and menaquinones. A comparison with chemical post-columns reduction for fluorescence detection (1982)
    Springer
    Chromatographia 15 (1982), S. 459-467 
    Details
    ISSN: 1612-1112
    Keywords: Liquid chromatography ; Photochemical reaction detection ; Chemical post-column reduction ; Fluorimetric detection ; Air segmented flow systems ; Non-aqueous reversed-phase chromatography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A new photochemical reaction method for the on-line fluorimetric detection of natural vitamin K homologs was developed. In addition to its high sensitivity, the method features an interesting selectivity for the determination of these compounds in a complex matrix such as human serum. The formation of different photolysis products as a function of reaction conditions, and the optimalisation of a segmented flow reaction system will be discussed. The results indicate that the method is 4 times more sensitive than UV detection, and at least as selective as fluorescence detection after post-column chemical reduction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261609
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Design and application of a post-column extraction system compatible with miniaturized liquid chromatography (1984)
    Springer
    Chromatographia 18 (1984), S. 5-10 
    Details
    ISSN: 1612-1112
    Keywords: Miniaturized HPLC ; Post-Column Extraction Detection ; Segmented-Flow Open-Tubular Reactors ; Membrane Phase Separator ; Anti-Cancer Drugs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An on-line, post-column, extraction system suitable for use with miniaturized HPLC (0.7–1 mm i.d. columns) is described. The system consists of a 30° angle segmenting tee, a PTFE extraction coil of variable length and a membrane phase separator. The internal volume of the phase separator is less than 1 μl. The total variance contribution of the system is between 1 and 6 sec2. The determination of the anti-cancer drugs VP 16 and VM 26 in urine by means of reversed-phase HPLC and fluorescence detection, using both on-column preconcentration and the present miniaturized post-column extraction system is presented as an application.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02279454
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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