2-(2-Thiazolylazo)-pcresol (TAC) as a reagent for the spectrophotometric determination of titanium (IV) |
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Authors: | Sérgio L C Ferreira A C Spinola Costa Henrique A S Andrade |
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Institution: | (1) Instituto de Quimica, Universidade Federal da Bahia, 40210 Salvador, Bahia, Brasil;(2) Dept. de Quimica, Pontificia Universidade Católica, 22453 Rio de Janeiro, RJ, Brasil |
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Abstract: | The reaction between titanium(IV) and 2-(2-thiazolylazo)-p-cresol-(TAC) in aqueous methanol media at apparent pH 4.0–5.6 results in a intensely coloured complex that is stable for at least 2 h. The combining ratio is 1 1 cation TAC. Beer's law is obeyed up to 5.0 g/ml titanium(IV) at 580 nm. The apparent molar absorptivity at 580 nm is 9.82.103 l.mole–1.cm–1 and the detection limit obtained was 5 ng/ml titanium (IV). A spectrophotometric method for the simultaneous determination of titanium and iron with TAC is proposed. |
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Keywords: | 2-(2-thiazolylazo)-p-cresol titanium determination simultaneous determination |
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