الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Titanium has been successfully separated using 1.0×10−4 mol L−1 ARS, 1.0×10−4 mol L−1 CTAB and 0.1% (w/v) Triton X-114 at pH 3 in the presence of 0.1 mol L-1 Na2SO4 at room temperature (25oC). The linear range of 0.3-80 and 7-200 ng mL-1 with a detection limit of 0.1 and 2.3 ng mL-1 were obtained for separation and determination of Ti(IV) with 50 mL solution using ICP-OES and visible spectrophotometry, respectively. A pre-concentration factor of 100 was achieved for both techniques. At optimum pH, the separation is proved to be highly selective for Ti(IV). The interference of 2000 fold excess of Fe3+ is tolerated using ascorbic acid as a masking agent. Also, NaH2PO4 is used to eliminate the interference caused by UO22+, Zr4+, Hf4+ and Al3+. The accuracy of the procedure was evaluated through recovery experiments on synthetic mixtures. The proposed procedure has been successfully applied for separation and determination of Ti(IV) in geological samples, simulated reference materials and water samples with satisfactory results.