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- W1973199296 abstract "Abstract A new ligand; 1,7-bis-(2′-carboxylphenyl)-1,4,7-trioxaheptane (BCPTH), its fluorescence intensity with terbium(III) was increased by more than two orders of magnitude in the present of sodium acetate (NaAc) or hexamethylene tetramine (HMTM) solution. Following the addition of organic solvents to the above system leading to the Tb3+ fluorescence was further enhanced by about an order of magnitude. The enhancement was observed to be highest with NaAc and dimethyl sulfoxide (DMSO) solvent. The spectrofluorimetric determination of trace amount of Tb3+ based on the phenomenon was carried out. The excitation and emission wavelengths are 296 nm and 545 nm, respectively. Under optimal conditions, the fluorescence intensities vary linearly with the concentration of Tb3+ in the range 7.0 × 10−9 M–4.8 × 10−5 M with a detection limit of 5.0 × 10−9 M. The interferences of some rare-earth metals and other inorganic ions are described. The method is a selective, sensitive, rapid, and simple analytical procedure..." @default.
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- W1973199296 date "2003-01-03" @default.
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- W1973199296 title "Determination of Trace Terbium(III) Based on New Fluorescence Enhancement System of Terbium(III) with 1,7-bis-(2′-Carboxylphenyl)-1,4,7-trioxaheptane by Sodium Acetate in Dimethyl Sulfoxide" @default.
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- W1973199296 doi "https://doi.org/10.1081/al-120017270" @default.
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