Detection of lead ions in aqueous solutions using laser-induced fluorescence from their chelates with YZS60 resins

Lead ions in aqueous solutions were detected by laser-induced fluorescence spectroscopy (LIFS) after the ions were removed from the solutions by YZS60 resin-based chelating reaction, and excited by a continuous wave semiconductor laser at 447 nm. Significant enhancement of fluorescence emission was observed, resulting in improving the detecting sensitivity of heavy metal ions in aqueous solutions. The limit of detection was 0.0011 mg/L, which was lower than the permissible level of drinking water 0.01 mg/L. The results indicate that the laser-induced fluorescence spectroscopy combined with the ion removing technique could be applied for effectively detecting lead ions in aqueous solutions, and this method has the characteristics of low device cost, simple operation and nondestructive testing of samples.