Dysprosium selective potentiometric membrane sensor.

Area of Science:

• Analytical Chemistry
• Materials Science

Background:

• Selective detection of Dy(III) ions is crucial for various applications.
• Development of novel sensing materials is essential for improving ion-selective electrode performance.

Purpose of the Study:

• To synthesize and characterize a new organic compound for use as a sensing element.
• To develop a novel Dy(III) ion-selective PVC membrane sensor.
• To evaluate the sensor's performance, including selectivity, detection limit, and response time.

Main Methods:

• Synthesis of 3,4-diamino-N'-((pyridin-2-yl)methylene)benzohydrazide (L).
• Fabrication of a PVC membrane sensor incorporating compound (L).
• Potentiometric measurements to assess sensor performance and selectivity.
• Application of the sensor in potentiometric titration and indirect ion determination.

Main Results:

• The sensor exhibited a Nernstian slope of 19.8 ± 0.6 mV/decade over a wide concentration range (1.0 × 10⁻⁶–1.0 × 10⁻² mol L⁻¹).
• A low detection limit of 5.5 × 10⁻⁷ mol L⁻¹, fast response time (<10s), and excellent selectivity for Dy(III) were achieved.
• The sensor was successfully applied in the potentiometric titration of Dy(III) with EDTA and in the indirect determination of F⁻ ions in mouthwash solutions.

Conclusions:

• The novel organic compound (L) serves as an effective sensing element for Dy(III) ion detection.
• The developed PVC membrane sensor demonstrates high performance characteristics for Dy(III) ion determination.
• The sensor shows potential for practical applications in chemical analysis and quality control.