Abstract
The optimal conditions for the microextraction separation, preconcentration, and spectrophotometric determination of sodium dodecyl sulfate (SDS) as an ion associate with quinaldine red are determined. The best extractants were found to be the mixtures of CCl4 with dichloroethane or chloroform; they ensure a 10- to 50-fold preconcentration of SDS from an aqueous medium into an organic microextract. We used cuvettes of special design to measure the absorbance of microextracts. A procedure for the extraction-spectrophotometric determination of anionic surfactants with the detection limit for SDS of 0.04 μg/mL is developed. The procedure was tested using wastewater samples.
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