Characterisation of ethoxylated fatty chains of anionic surfactants and determination of residual ethoxylated fatty alcohols |
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Authors: | Julien Morvan Magali Saluden Valérie Agasse Florence Barbot Pascal Cardinael Jean-Philippe Bouillon Gautier Decock |
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Institution: | Laboratoire Synthèse et Chromatographie, UPRES EA 3233, Sciences et Méthodes Séparatives, Université de Rouen, Rue Tesnières, 76821, Mont Saint Aignan Cedex, France. |
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Abstract: | Bachus et al. 1] recently described a new derivatisation method using 2-furoyl chloride for the characterisation of mixtures of polyethoxylated
alcohols and their corresponding sulfates. This paper deals with the control of the derivatisation steps; hydrolysis and extraction
conditions were optimised. The method is extended to the characterisation of alkyl sulfosuccinates, alkyl sulfoacetates and
alkyl phosphates and to the analysis of residual polyethoxylated alcohols in surfactants. Extraction of non-ionic compounds
using solid-phase extraction cartridges was performed before derivatisation. Residual amounts of alcohol were determined in
five commercial anionic surfactants. Moreover, direct derivatisation without preliminary SPE in the same anionic surfactants
proved to be efficient for dry samples. |
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Keywords: | 2-Furoyl chloride Alkyl sulfates Alkyl sulfosuccinates Alkyl sulfoacetates HPLC-UV SPE |
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