Extraction and spectrophotometric determination of titanium(IV) with N-phenyllaurohydroxamic acid and phenylflurone

Abstract

N-Phenyllaurohydroxamic acid reacts with titanium(1V) in 9-10 M hydrochloric acid to give a complex that is completely extractable into solvents such as hexane and chloroform. The chloroform extract of the titanium complex, on second extraction from a dilute hydrochloric acid medium (0.1-0.5 M), in the presence of phenylfluorone and isoamyl alcohol, forms an intensely coloured complex possessing an absorption maximum at 540 nm. Even though the molar absorptivity of the complex under optimum conditions a t 540 nm is 2.33 x 105 1 mol-l cm-l, the measurements are more precise at 560 nm with a molar absorptivity of 1.23 x lo5 1 mol-l cm-l. The system obeys Beer's law for up to 0.4 p.p.m. of titanium(1V). Considerable amounts of many cations and anions including a 350-fold molar excess of iron(II1) can be tolerated. Interference from zirconium(1V) can be mitigated or even eliminated by the addition of fluoride ions. The method can be applied to the determination of titanium present a t 10 parts per log.

An innovative approach in titanium determination based on incorporating 2-amino-4-((4-nitrophenyl)diazenyl)pyridine-3-ol in a PVC membrane

“…Notably, the achieved molar absorptivity surpasses that of previously reported methods. [63][64][65][66][67][68][69][70][71][72][73][74][75] underscoring the superior performance of our approach. Moreover, our procedure exhibits outstanding selectivity, characterized by impressively low limits of detection and quantication.…”

A new spectrophotometric method for the determination of trace amounts of titanium(IV)

“…Spectrophotometric techniques remain a frequent choice for routine analyses as they provide simple, accurate and inexpensive solutions when compared to other methods. Several spectrophotometric methods were reported in the literature for the analytical determination of titanium(IV) [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. These methods adopt relatively complicated and time sensitive procedures or involve sensitive extraction steps prone to contamination at any stage of the analysis and hence require skilled analysts [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25].…”