Abstract
The development of an analytical method for determination of alcohol ethoxylates (AEs), important non-ionic surfactants, in fish is described. Combination of matrix solid-phase dispersion (MSPD) extraction with aluminum oxide clean-up allows for determination of AEs in fish samples with recoveries higher than 75%. The use of internal standards allowed for correction of losses during preparation of the individual samples. Incurred AE constituents could be quantified without integration being compromised by interferences for all compounds except for C 14EO 14. Parallel determinations of the concentrations of 14C-C 13EO 8 in fish by TLC–RAD and liquid scintillation counting and by HPLC measurements after isolation and derivatization yielded very similar results demonstrating the validity of the isolation and measurement method.
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