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    A new organic carbon detector for size exclusion chromatography.

    Access Status
    Fulltext not available
    Authors
    Allpike, Bradley
    Heitz, Anna
    Joll, Cynthia
    Kagi, Robert
    Date
    2007
    Type
    Journal Article
    
    Metadata
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    Citation
    Allpike, Bradley P. and Heitz, Anna and Joll, Cynthia A. and Kagi, Robert I. 2007. A new organic carbon detector for size exclusion chromatography. Journal of Chromatography A 1157: pp. 472-476.
    Source Title
    Journal of Chromatography A
    DOI
    10.1016/j.chroma.2007.05.073
    ISSN
    00219673
    Faculty
    Department of Applied Chemistry
    School of Science and Computing
    Faculty of Science and Engineering
    Remarks

    The link to the journal’s home page is: www.elsevier.com/locate/chroma

    Copyright © 2007 Elsevier B.V. All rights reserved

    URI
    http://hdl.handle.net/20.500.11937/3477
    Collection
    • Curtin Research Publications
    Abstract

    A novel organic carbon detector (OCD) for size exclusion chromatography (SEC), and its application to the characterisation of aquatic natural organic matter (NOM) in natural and treated potable water samples, is described. The instrument uses a conventional UV-persulfate oxidation technique to convert organic carbon to CO2. The novelty of the technique is detection of the evolved CO2 using a sensitive Fourier transform infrared (FTIR) spectroscopy 'lightpipe' detector originally designed for detection of analytes after gas chromatographic separation. With the exception of the lightpipe, the OCD system was constructed using simple, inexpensive, readily available components. The system was designed to minimise deadvolume, allowing for use of smaller sample sizes and smaller columns, substantially shortening analysis time, while maintaining chromatographic integrity through the OCD system. Downscaling resulted in some loss of separation but it was shown that this was caused by thelower separation efficiency of the smaller capacity column, rather than from sample dispersion within the OCD system.

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