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An extraction—spectrophotometmc method for the determination of non-ionic surfactants |
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| Authors: | P.T. Crisp J.M. Eckert N.A. Gibson I.J. Webster |
| Affiliation: | Department of Inorganic Chemistry, University of Sydney, N.S.W. 2006 Australia |
| Abstract: | The surfactant is extracted into 1,2-dichlorobenzene as a neutral adduct with potassium tetrathiocyanatozincate(II), and zinc(II) in the extract is determined spectrophotometrically after addition of l-(2-pyridylazo)-2-naphthol and triethanolamine. With a 150-ml water sample, the limit of detection is 15 μg l-1 (as Triton X-100). The method requires only one extraction and is applicable, without modification, to fresh, estuarine and sea-water samples. |
| Keywords: | Present address: Department of Chemistry The University of Wollongong Wollongong N.S.W. 2500 Australia. |
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