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

In this research, a polymeric fluorescence sensor was developed to detect Ni(II) ions. A polymeric membrane was prepared, and its structural and morphological properties were analyzed through FTIR and SEM. The fluorescence properties of the sensor and the optimal conditions for Ni(II) ion detection were investigated. The sensor's excitation and emission wavelengths were identified as 390 nm and 530 nm, respectively, with a reduction in fluorescence intensity observed in the presence of Ni(II) ions. Key factors affecting fluorescence intensity, such as pH, response time, and potential interference from foreign ions, were extensively studied. Optimal conditions were determined to be at pH 5.0 and 20 s. The method demonstrated a linear detection range of 1.70 × 10⁻⁸-3.41 × 10⁻⁷ mol L^-1 and a detection limit of 4.81 × 10⁻⁹ mol L^-1. This method has been successfully applied for the selective, sensitive, and rapid quantification of Ni(II) ions in wastewater, blood serum, and tap water. It is a method with the potential to offer significant advantages over existing literature methods, including high sensitivity, selectivity, low cost, and an environmentally friendly analytical approach.