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Synthesis of Hydroxy Sulfonate Surfactants
Molecules 2005, 10(9), 1179-1189; doi:10.3390/10091179

HPLC Analysis of Aliphatic Sulfonate Surfactants using Ion-Pair Detection

, ,  and *
Department of Chemistry, Norwegian University of Science and Technology, Norway
* Author to whom correspondence should be addressed.
Received: 10 November 2004 / Revised: 29 August 2005 / Accepted: 30 August 2005 / Published: 30 September 2005
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A method was developed for the analysis of a number of surfactants which contained no UV-chromophores, using RP-HPLC with Indirect Photometric Detection, IPD. Pyridinium salts such as N-methylpyridinium iodide, N-methyl-2,2'-dipyridinium iodide and N,N'-dimethyl-2,2'-dipyridinium diiodide, were used as the visualization reagents, forming ion-pair complexes with the sulfonate surfactants. This allowed ordinary UV-detection. N-methylpyridinium iodide proved to be a suitable reagent, both with respect to ease of preparation and response. The eluents consisted of mixtures of acetonitrile and water, being 0.1 - 0.25 mM with respect to pyridinium salt. The method was sensitive and exhibited good signal to noise ratios, as well as linear responses over a wide concentration range. All of the analyzed surfactants were separated, including the diastereomeric forms of some of the surfactants.
Keywords: Surfactant / Analysis / Ion-pair detection / HPLC Surfactant / Analysis / Ion-pair detection / HPLC
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Zahrobsky, M.; Camporese, D.; Rist, O.; Carlsen, P. HPLC Analysis of Aliphatic Sulfonate Surfactants using Ion-Pair Detection. Molecules 2005, 10, 1179-1189.

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