Abstract
The extraction constants for ion associates of SDS with several dyes have been determined. Of the dyes examined, methylene blue is the most useful reagent. By use of methylene blue, trace amount of anionic surfactants can be extracted into 1,2-dichloroethane in a single step extraction and determined spectrophotometrically at 657nm. With a lOOmL water sample, the detection limit of this method is 9 parts per billion. The method is simple and rapid.
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Ho, WH. A Spectrophotometric Determination of Anionic Surfactant with Methylene Blue. ANAL. SCI. 7 (Suppl 1), 61–64 (1991). https://doi.org/10.2116/analsci.7.Supple_61
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DOI: https://doi.org/10.2116/analsci.7.Supple_61