Complexometric determination of mercury(II) in waters by spectrophotometry of its dithizone complex |
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Authors: | Frédéric Théraulaz Olivier P Thomas |
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Institution: | (1) Laboratoire de Chimie et Environnement, Université de Provence, Case 29, 3, Place Victor Hugo, F-13331 Marseille Cedex, France |
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Abstract: | This paper presents a new method for the determination of Hg(II) in waters, using indirect spectrophotometric measurements of the Hg(II) dithizone complex. The reagent is a mixture of dithizone, CDTA (1,2-cyclohexylene-dinitrilo-tetraacetic acid), thiourea, ethylic alcohol and glycine. Sensitivity and working range are 0.4 g · l–1 and 2–100 g · l–1, respectively. A comparison of the results with those of the cold-vapor atomic absorption spectrometry shows a good correlation for different samples revealing only small interferences. The new method is well suited for on-line measurements, easy to run and has low cost equipment. |
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Keywords: | water analysis mercury spectrophotometry complexometry |
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