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Spectrophotometric Determination of Trace Amounts of Titanium(IV) in Environmental Samples after Preconcentration on a Membrane Filter

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Abstract

A preconcentration technique having a high concentration factor, based on collecting trace elements on a membrane filter and dissolving the membrane filter with them in an organic solvent, has been applied to the spectrophotometric determination of titanium(IV) in environmental samples. Titanium reacts with sodium 1,2-dihydroxybenzene-3,5-disulfonic acid (Tiron) to form a water-soluble chelate anion, which, in turn, forms a precipitate with benzyldimethyltetradecylammonium chloride (Zephiramine). After the precipitate is filtered through a membrane filter it is dissolved together with the filter into dimethyl sulfoxide (DMSO). The absorbance of the solution is then measured at 382 nm. In the presence of vanadium(V) it is performed at 382 and 660 nm. Molybdenum(VI) must be previously removed by extraction with a-benzoinoxime. The accuracy and precision of the proposed method have been confirmed by the determination of titanium(IV) in various plant standards. Titanium(IV) in mine drainage was determined at the ng/ml level.

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Shida, J., Tsujikawa, Y. Spectrophotometric Determination of Trace Amounts of Titanium(IV) in Environmental Samples after Preconcentration on a Membrane Filter. ANAL. SCI. 10, 775–777 (1994). https://doi.org/10.2116/analsci.10.775

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  • DOI: https://doi.org/10.2116/analsci.10.775

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