Abstract.
In this work, a new ligand, 2,9-bis[N,N-bis(carboxymethyl)-aminomethyl]-1,10-phenanthroline (BBCAP), was synthesized and used to establish a novel fluorimetric method for the determination of trace amounts of terbium in a binary system. Its luminescence mechanism was studied. The excitation and emission wavelengths are 284 nm and 547 nm, respectively. Other rare-earth metal ions in 100-fold excess caused no interference. The fluorescence intensity was a linear function of the concentration of terbium in the range of 5.0 × 10−10–1.0 × 10−6 mol/L. The detection limit was 2.0 × 10−11 mol/L (n = 12). The standard addition method was used to determine the terbium in a synthetic rare-earth sample with satisfactory results. This method represents a direct, rapid, selective and sensitive analytical procedure with a widely linear range.
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Received November 29, 2001 Revision February 9, 2002
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Lin, P., Zheng, H., Zhu, QZ. et al. A new Fluorimetric Reagent for Highly Selective and Sensitive Determination of Terbium Ion. Microchim Acta 140, 125–129 (2002). https://doi.org/10.1007/s006040200074
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DOI: https://doi.org/10.1007/s006040200074