HPLC Analysis of Aliphatic Sulfonate Surfactants using Ion-Pair Detection
Journal article, Peer reviewed
Permanent lenke
http://hdl.handle.net/11250/2359751Utgivelsesdato
2005Metadata
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- Institutt for kjemi [1405]
- Publikasjoner fra CRIStin - NTNU [38679]
Sammendrag
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.