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Applications of permanganate chemiluminescence to the analysis of food components

Agater, Irena Barbara (1999) Applications of permanganate chemiluminescence to the analysis of food components. Doctoral thesis, University of Huddersfield.

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    Abstract

    Chemiluminescent oxidations with manganese reagents have been
    investigated using flow and spectroscopic techniques.

    An assay has been developed for ascorbic acid using the chemiluminescent
    oxidation of ascorbic acid with permanganate in acid medium. The assay has
    a linear range of 5xl 0-7 to 1 X, 0-3 mol dM-3 and has been applied to a range of
    food supplements and fruit juices.

    The addition of a manganese (11) catalyst extends the applicability of acid
    permanganate to the determination of sugars and polyhydric alcohols. The
    reaction has been optimised for the determination of mono and disaccharides
    in a flow injection system.

    Development of a reagent based on manganese (111)i,n a methanol and
    sulphuric acid solution, has further extended the scope of the reaction
    enabling the determination of fructose in the range 1 X1 0-7 to 1 X1 0-3 mol d M-3.
    The reagent has successfully been used in post column detection with HPLC.

    It has been established that the light emission occurs after manganese (VII)
    has been reduced and appears to be connected with the production and
    disappearance of Mn (111). Chemiluminescence spectroscopy has shown that
    the spectra are the same for a large number of aliphatic and aromatic
    polyhydroxy compounds. The spectrum remains the same whether the
    oxidising reagent is Mn (VII), Mn (IV) or Mn (111)i,n dicating that the same
    emitting species is involved in all these reactions and that it involves Mn(III)
    and/or Mn(II).

    Item Type: Thesis (Doctoral)
    Additional Information: EThOS Persistent ID uk.bl.ethos.323810
    Uncontrolled Keywords: Ascorbic acid, Manganese, Sugars, Chemistry, Physical and theoretical Food Chemistry
    Subjects: Q Science > QD Chemistry
    Schools: School of Applied Sciences
    Depositing User: Graham Stone
    Date Deposited: 22 Oct 2009 16:17
    Last Modified: 28 Jul 2010 19:48
    URI: http://eprints.hud.ac.uk/id/eprint/5955

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