Rapid and Precise Detection of Nickel(II) Ions Using a Fluorescent Polymeric Sensor

Area of Science:

• Analytical Chemistry
• Materials Science
• Environmental Science

Background:

• Nickel(II) ions are significant environmental pollutants.
• Accurate detection of Ni(II) is crucial for environmental and health monitoring.
• Existing detection methods can be costly or complex.

Purpose of the Study:

• To develop a novel polymeric fluorescence sensor for Ni(II) ion detection.
• To optimize sensor performance and evaluate its applicability in real samples.
• To provide a sensitive, selective, and cost-effective analytical method.

Main Methods:

• Fabrication of a polymeric membrane sensor.
• Characterization using FTIR and SEM.
• Fluorescence spectroscopy for Ni(II) detection and optimization of parameters (pH, response time).

Main Results:

• The sensor exhibited fluorescence quenching upon Ni(II) binding at excitation/emission wavelengths of 390/530 nm.
• Optimal detection achieved at pH 5.0 with a 20s response time.
• Linear detection range: 1.70×10⁻⁸-3.41×10⁻⁷ mol L⁻¹, detection limit: 4.81×10⁻⁹ mol L⁻¹.
• Successful application in wastewater, blood serum, and tap water analysis.

Conclusions:

• The developed polymeric fluorescence sensor offers high sensitivity and selectivity for Ni(II) detection.
• The method is rapid, cost-effective, and environmentally friendly.
• This approach presents a promising alternative to existing methods for Ni(II) quantification.