title: Column chromatographic separation of uranium(VI) and other elements using poly(dibenzo-18-crown-6) and ascorbic acid medium.
abstract: A selective and very effective separation method for uranium(VI) has been developed by using poly(dibenzo-18-crown-6) and column chromatography. The separations are carried out from ascorbic acid medium. The adsorption of uranium(VI) was quantitative from 0.00002 to 0.006 M ascorbic acid. The elution of uranium(VI) was quantitative with 2.0-8.0 M HCl and 2.0-5.0 M H2SO4. The capacity of poly(dibenzo-18-crown-6) for uranium(VI) was found to be 0.92 +/- 0.01 mmol g(-1) of crown polymer. Uranium(VI) was separated from a number of cations in binary as well as in multicomponent mixtures. The method was extended to the determination of uranium in geological samples. It is possible to separate and determine 5 ppm of uranium(VI) by this method. The method is very simple, rapid, selective and has good reproducibility (approximately +/- 2%).
authors.affiliation: Environmental Analytical Chemistry Laboratory, Department of Chemistry, Shivaji University, Kolhapur 416 004, India. bsmohite@hotmail.com
authors.forename: Baburao S
authors.initials: BS
authors.lastname: Mohite
authors.forename: Amol S
authors.initials: AS
authors.lastname: Jadhav
mesh_terms: D001205:Ascorbic Acid / Q000737:chemistry*; D004988:Ethers, Cyclic / Q000737:chemistry*; D014501:Uranium / Q000302:isolation & purification*
chemical_list: D004988:Ethers, Cyclic; D014501:Uranium; D001205:Ascorbic Acid