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Europium can form a stable chelate with pyridine-2,4,6-tricarboxylic acid (PTA) with a ratio of 1:1 in aqueous. The system, having the maximum excitation and emission wavelengths at 311.0 nm and 616.3 nm, separately, shows a con-stant fluorescence intensity in the pH range of 11.0-12.0. The method has high selectivity and sensitivity as well as low ef-fect from foreign ions. The optimum determinate conditions were obtained. The fluorescence intensity is a linear function of Eu3+ concentration in the range of 0.0029-1.5200 μg?mL?1 and the limit of detection is 2.90 ng?mL?1.
Europium can form a stable chelate with pyridine-2,4,6-tricarboxylic acid (PTA) with a ratio of 1: 1 in aqueous. The system, with the maximum excitation and emission at 311.0 nm and 616.3 nm, separately, shows The method has high selectivity and sensitivity as well as low ef-fect from foreign ions. The optimum determinate conditions were obtained. The fluorescence intensity is a linear function of Eu3 + concentration in the range of 0.0029-1.5200 μg? mL? 1 and the limit of detection is 2.90 ng? mL? 1.