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Molecules 2005, 10(9), 1179-1189;

HPLC Analysis of Aliphatic Sulfonate Surfactants using Ion-Pair Detection

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. View Full-Text
Keywords: Surfactant / Analysis / Ion-pair detection / HPLC Surfactant / Analysis / Ion-pair detection / HPLC

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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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