Determination of Sulphide in Sewage Effluents Using a New Spectrophotometric Method |
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| Authors: | A Punta F J Barragán M Ternero A Guiraum |
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| Institution: | 1. Department of Analytical Chemistry , University of Sevilla , Sevilla, Spain;2. Department of Analytical Chemistry , University of Sevilla , Sevilla, Spain;3. F. J. Barragán, Facultad de Quimica , c/o Professor G. Gonzalex s/n, 40102, Sevilla, Spain |
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| Abstract: | Abstract A suitable indirect spectrophotometric method for the determination of sulphide in water, based on the reduction of 1,2-naphthoquinone-4-sulphonate (NS) has been developed. The excess of NS is spectrophotometrically determined based on the red colour produced in its reaction with sulphanilic acid at pH 4.0–6.5. Maximum colour intensity is obtained after 40 min and the apparent molar absorptivity at 470mm is 3.5×103I.mol?1.cm?1. The sulphide concentrations can be calculated by the difference in absorption of blanks and samples. |
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| Keywords: | Sulphide determination water analysis spectrophotometry 1 2-naphthoquinone-4-sulphonate sulphanilic acid |
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