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Spectrophotometric extractive determination of Ti in mineral samples and aluminium alloys as a mixed-ligand Ti(IV)-salicylhydroxamic acid-thiocyanate complex |
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| Authors: | Luis Fermín Capitán-Vallvey Antonio Molina-Díaz María Luisa Fernández de Córdova Maria Isabel Pascual-Reguera |
| Institution: | (1) Department of Analytical Chemistry, Faculty of Sciences, University of Granada, E-18071 Granada, Spain;(2) Department of Analytical Chemistry, University College of Jaén, E-23071 Jaén, Spain;(3) University of Granada, E-23071 Jaén, Spain |
| Abstract: | A sensitive method for the determination of titanium, based on the formation of a mixed-ligand Ti (IV)-salicylhydroxamic acid-thiocyanate complex and extraction of this into a liquid ion-exchanger phase has been developed. The extract has maximum absorbance at 400–460 nm and the apparent molar absorptivity is 1.8 × 104l · mole–1 · cm–1 at 420 nm. The system obeys Beer's law at 420 nm in the range 0.16–3.20 mg/1 Ti, the detection limit being 0.1 mg/1. The method is found suitable for determination of titanium in aluminium alloys and silicate rocks. |
| Keywords: | titanium determination spectrophotometry extraction liquid ionexchanger ores and aluminium alloys analysis |
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