title: Fluorimetry determination of trace Ce3+ with EDTP.
abstract: The use of ethylenediaminetetrakis(methylphosphonic) acid (EDTP) in the fluorimetry determination of trace amounts of Ce3+ ions is described. The fluorescence intensity of Ce3+ was greatly enhanced when an 1:1 complex with EDTP in solution of pH 7-8 formed. The apparent excitation and emission wavelength used were 313 and 397 nm, respectively. The fluorescence intensity varied linearly with the concentration of Ce3+ in the range of 1 x 10(-8) -1 x 10(-4) mol l(-1). The quenching effects of coexist ions (other rare earth ions, Fe3+ and some inorganic anions) were studied. This technique has unique advantage in eliminating disturb of coexist.
authors.affiliation: Department of Chemistry, Jinan University, Guangzhou, PR China. mengix@163.net
authors.forename: J X
authors.initials: JX
authors.lastname: Meng
authors.forename: H J
authors.initials: HJ
authors.lastname: Wu
authors.forename: D X
authors.initials: DX
authors.lastname: Feng
mesh_terms: D002138:Calibration; D002563:Cerium / Q000032:analysis*; D004355:Drug Stability; D005029:Ethylenediamines / Q000737:chemistry*; D005470:Fluorometry / Q000379:methods*; D063065:Organophosphonates / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods; D013997:Time Factors
chemical_list: D005029:Ethylenediamines; D063065:Organophosphonates; C418473:ethylenediaminetetrakis(methylphosphonic) acid; D002563:Cerium