Spectrophotometric Investigation of Reaction of Titanium with Chromotropic Acid

Separation of Iron by Reversed-Phase Chromatography.

“…of 2-octanoneequilibrated 6 M hydrochloric acid. The effluent from the column was fumed down with sulfuric acid and analyzed by a spectrophotometric chromotropic acid procedure (1). The recovery of titanium(IV) was slightly high.…”

“…Samples of eluate and standards containing about 2 Mmoles of titanium(IV) were analyzed spectrophotometrically by a slightly modified chromotropic acid procedure (1). Titanium(IV) standards were prepared by diluting 1 to 10 ml.…”

Light Absorption Spectrometry

“…Hence, it was recommended that the buffer and titanium (IV) solutions be added to the ascorbic acid reagent. The reaction of chromotropic acid with titanium (IV) has been studied critically (73) and compared with the reactions in which biand trivalent phenols were used as reagents (473). Spectrophotometric evidence indicates polymeric species in concentrated solutions of peroxytitanic acid but only the monomer in dilute solutions (522).…”

Trace copper ion detection by the suppressed decolorization of chromotrope 2R complex

“…17) (abbreviated as CR, the structure is shown in Scheme 1) is a type of azo dye. 18,19 CR and/or its homologs have been used to detect nitrate, 20 formaldehyde, 21 methanol, 22 titanium, 23 and unsymmetrical dimethylhydrazine. 24 Moreover, they were used as chelating agents for metal ions, particularly Cu 2+ ions.…”