Studies On The Extraction And Spectrophotometric Determination Of Titanium (iv) Using Nt. Hydroxy - N1n2.diphenylbenzamidine And Thiocyanate

Titanium (IV) has been found to react with N'·Hydroxy.N',N2.diphenylbenzamidine (rnHDPBA) and thiocyanate to form an orange colored mixed ligand complex which wasrnquantitatively extractable into toluene from 0.5 . 0.25 M HCl solutions. The complexrnexhibited an absorption maximum in the visible region at 400 nm with a molar absorptivityrn0[20,000 M" cm" and the system obeyed Beer's law in the concentration range of 0.29·3.6rnppm of Ti. The composition of the complex has been established spectrophotometricallyrnto be 1: 1:2 (Ti: SCN:HDPBA). The effects of foreign ions and several other experimentalrnvariables have been studied to establish the optimum conditions for the extraction andrndetermination of titanium. On the basis of these studies a new method has been developedrnfor the determination of titanium (IV) with HDPBA and thiocyanate by solvent extractionrnand spectrophotometry. The method is precise, fairly sensitive and highly selective and freernfrom rigid control of experimental variables, Moreover, the method has been successfullyrnapplied to the determination of titanium in several synthetic samples corresponding torntitanium containing ores, minerals and alloys

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