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  • 1
    Electronic Resource
    Electronic Resource
    Advances in capillary electrochromatography (1997)
    Weinheim : Wiley-Blackwell
    Electrophoresis 18 (1997), S. 2162-2174 
    Details
    ISSN: 0173-0835
    Keywords: Electrochromatography ; Packed capillaries ; Electroseparations ; Open tubular columns ; Electroosmotically driven flows ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Capillary electrochromatography (CEC) is a hybrid between capillary electrophoresis and high performance liquid chromatography (HPLC) that has gained popularity in recent years. CEC uses an electrically driven flow to transport the solutes through the chromatographic column. Separation can be achieved by differential partition between two phases, differential electromigration, or a combination of these two. Herein, the main features of CEC are presented, including basic principles and a literature overview on different practical approaches used.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elps.1150181207
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Capillary electrophoresis with constant potential amperometric detection using a nickel microelectrode for detection of carbohydrates (1996)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 19 (1996), S. 613-616 
    Details
    ISSN: 0935-6304
    Keywords: Capillary electrophoresis ; Electrochemical detection ; End column detection ; Nickel electrode ; Carbohydrates ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Carbohydrates were separated by capillary electrophoresis (CE) and detected electrochemically using a nickel microelectrode which was operated at a constant applied potential (∼0.6 V vs. Ag/AgCI). A simple capillary electrode holder design facilitated alignment between the separation capillary and the working microelectrode without the use of micro-positioning equipment. The separations were performed under alkaline conditions (pH 〉 11), matching the high pH requirements for amperometric detection at the nickel electrode. The analytical procedure developed showed detection limits for the carbohydrates studied in the micromolar range, showing a linear response in the range tested (micromolar to millimolar). The procedure was used to identify sugars in two real samples (i.e., urine and in a common beverage). The potential use of the system for the determination of amino acids was also demonstrated.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240191104
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    Paper (German National Licenses)
    Fulltext
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