Fibre-optic titrations-IV Direct complexometric titration of aluminium(III) with DCTA |
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Authors: | Wolfbeis O S Schaffar B P Chalmers R A |
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Affiliation: | Institute of Organic Chemistry, Karl-Franzens-University, 8010 Graz, Austria. |
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Abstract: | The end-point of the direct complexometric titration of Al(3+) in pH 4.6 solution can be determined by monitoring the fluorescence intensity of the aluminium-morin complex, by use of a bifurcated fibre-optic light guide. The method allows the determination of aluminium in the 1-800 ppm range with good precision. The procedure is applicable even when the solutions are strongly coloured or turbid, but because of the slow complexation kinetics requires a titration time of about 20 min. |
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