Abstract
N- m-Tolyl- n-phenylhydroxylamine is proposed for the spectrophotometric determination of titanium. The reagent forms a yellow chloroform-soluble complex with titanium in media with a hydrochloric acid concentration of at least 9 M. The apparent molar absorptivity at 380 nm is 7.4 × 10 3 1.mole −1.cm −1. The optimum final concentration range is 0–54 μg of titanium in 10 ml of chloroform. The complex contains the metal and reagent in 1:2 ratio. The proposed method has been successfully applied to the determination of titanium in coal, coal fly-ash, pond sediment and asphalt.
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