title: Estimation of Eu(3+) in bulk uranium by ligand sensitized fluorescence in dimethyl sulphoxide.
abstract: Ligand sensitized fluorescence of europium ion using thenoyltrifluoroacetone (TTA) as a sensitizing ligand and dimethyl sulphoxide (DMSO) as a solvent is studied for the first time. TTA ligand enhances the fluorescence of Eu(3+) by a factor of 40000 in DMSO. Linearity is obtained for a concentration range of 0.076-7.6ng/mL of Eu(3+) with a detection limit of 7.6pg/mL. The quenching of Eu(3+)-TTA fluorescence by uranium matrix was studied in different solvents and found to be less in DMSO. Consequently, estimation of Eu(3+) in a large excess of uranium becomes a possibility without the need to separate uranium from the solution, which has been demonstrated in this paper. Satisfactory results are obtained when Eu(3+) is present at a concentration of 0.6μg/g in uranium.
authors.affiliation: Materials Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India. Electronic address: siuli@igcar.gov.in.
authors.forename: S
authors.initials: S
authors.lastname: Maji
authors.affiliation: Materials Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India.
authors.forename: Satendra
authors.initials: S
authors.lastname: Kumar
authors.affiliation: Materials Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India.
authors.forename: K
authors.initials: K
authors.lastname: Sankaran
mesh_terms: D002412:Cations / Q000032:analysis; D004121:Dimethyl Sulfoxide / Q000737:chemistry*; D005063:Europium / Q000032:analysis*; D005453:Fluorescence; D057230:Limit of Detection; D013050:Spectrometry, Fluorescence / Q000379:methods; D013804:Thenoyltrifluoroacetone / Q000737:chemistry*; D014501:Uranium / Q000737:chemistry*
chemical_list: D002412:Cations; D013804:Thenoyltrifluoroacetone; D005063:Europium; D014501:Uranium; D004121:Dimethyl Sulfoxide
keywords: Dimethyl sulphoxide (DMSO); Europium; Ligand sensitized fluorescence; Thenoyltrifluoroacetone (TTA); Uranium