title: [Study on the separation and spectroscopic characteristics of titanium and lauthanum in two-phase aqueous systems].
abstract: In Polyethylene glycol-ammonium sulfate-chrome azurol S two-phase aqueous systems, the liquid-liquid extraction behavior of Ti(IV), Zr(IV) and La(III) with chrome azurol S as the extractant was investigated. Experimental result indicated that the complex of La(III) with CAS was almost completely extracted by the PEG phase, Zr(IV) partly extracted, while Ti(IV) was not extracted from the aqueous solution of pH 4.5-7.0. So extraction separation of Ti(IV)-La(III) was carried out at pH 5.5. Comparing to a general water phase spectrophotometry, the new method has advantage of maximum wavelength of complex shifted to the red wavelength, existing form of complex anion in PEG phase was studied by the addition of surface-active agent and the measurement of absorption spectra.
authors.affiliation: Department of Chemistry, Huaibei Coal Teachers' College, Huaibei 235000, China.
authors.forename: Fan-zheng
authors.initials: FZ
authors.lastname: Deng
authors.forename: Ying
authors.initials: Y
authors.lastname: Shi
authors.forename: Hai-sheng
authors.initials: HS
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D000645:Ammonium Sulfate / Q000737:chemistry*; D002614:Chelating Agents; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D007811:Lanthanum / Q000737:chemistry* / Q000302:isolation & purification; D044367:Phase Transition; D011092:Polyethylene Glycols / Q000737:chemistry*; D011108:Polymers; D012996:Solutions; D012997:Solvents; D013053:Spectrophotometry / Q000379:methods; D013501:Surface-Active Agents; D014025:Titanium / Q000737:chemistry* / Q000302:isolation & purification; D015040:Zirconium / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D002614:Chelating Agents; D011108:Polymers; D012996:Solutions; D012997:Solvents; D013501:Surface-Active Agents; D011092:Polyethylene Glycols; D007811:Lanthanum; D015040:Zirconium; D014025:Titanium; D000645:Ammonium Sulfate