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Ion chromatographic separation of hydrogen ion and other common mono- and divalent cations


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Xu, Q and Mori, M and Tanaka, K and Hu, W and Haddad, PR (2004) Ion chromatographic separation of hydrogen ion and other common mono- and divalent cations. Journal of Chromatography A, 1023 (2). pp. 239-245. ISSN 0021-9673

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We introduced an approach to the ion chromatographic determination of common mono- and divalent cations including hydrogen ion and demonstrated the ability of a C30 column dynamically coated first with dodecylsulfate and then with 18-crown-6 ether to separate the cations by ion-exchange mechanism. Using an ethylenediamine solution containing a small concentration of 18-crown-6 ether and lithium dodecylsulfate at pH 6.2 as eluent, the cations were eluted in the order Li+<Na+<NH4+<H+<K+<Mg2+<Ca2+ with symmetrical peaks. The conductivity vs. concentration plots were linear about three orders of magnitude, from millimolar to micromolar; and the detection limits were all <0.6 μM. Rainwater was analyzed directly using this ion chromatographic system with satisfactory results.

Item Type: Article
Keywords: Water analysis; Stationary phases, LC; Rainwater; Acidity; Cations
Journal or Publication Title: Journal of Chromatography A
Page Range: pp. 239-245
ISSN: 0021-9673
Identification Number - DOI: 10.1016/j.chroma.2003.10.017
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Date Deposited: 03 Oct 2008 03:22
Last Modified: 18 Nov 2014 03:51
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