A Fluorimetric Method Based on an Imidazole Compound for Cu²⁺ Determination in Tap Water

Figure 3

The effect of metal ions on fluorescence spectra of L in acetonitrile-water (1 : 1). L: 2.0 × 10⁻⁷ M; metal ion: 2.0 × 10⁻⁶ M.