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Pure Appl. Chem. 76(4), 839-845, 2004
Pure and Applied Chemistry
Vol. 76, Issue 4
Potentiometric detection for high-performance liquid chromatography is a reality: Which classes of organic substances are the targets?
L. J. Nagels
Chemistry Department, Antwerp University, Groenenborgerlaan
Abstract: Potentiometric detection in high-performance liquid
chromatography (HPLC) is shown to be an underexploited technique. The
technique can be of great use to less classical
potentiometry targets, such as bioorganics, of low as well as of high
molecular weight. The understanding of non-faradaic potentiometry is,
however, still problematic. Predicting the selectivity and sensitivity
of a potentiometric electrode for organic ionizable substances can be
done to a certain extent using QSAR methods. Although many new polymer
materials and synthetic receptor molecules for organic ionics are being
synthesized, few of them are applied in potentiometric membrane coatings.
Hydrophilic organics form an interesting target
group for these new materials.
*Plenary lectures presented at the Inaugural Conference for the Southern and Eastern Africa Network of Analytical Chemists (SEANAC), Gaborone, Botswana, 7-10 July 2003. Other presentations are published in this issue, pp. 697-888.
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