Original Potentiometric Ytterbium(III) PVC-Membrane Sensor Based on N¹,N²-Bis-[1-(2-hydroxy-1,2-diphenyl)ethylidene]ethanedihydrazide

Abstract

In this work, we describe the construction, performance, and applications of an original ytterbium(III) sensor based on N¹,N²-bis-[1-(2-hydroxy-1,2-diphenyl)ethylidene]ethanedihydrazide (BHDEH), which acts as a suitable carrier. Because it has a low detection limit of 4.2 × 10⁻⁷ M, the sensor response for the Yb(III) ion is Nernstian over a wide concentration range: four decades of concentration (1.0 × 10⁻⁶ to 1.0 × 10⁻² M). The response time of the electrode is less than 10 s, it can be used in the pH range of 3.2–8.3, and its duration is at least 2 months without any considerable potential divergence. The sensor revealed very good selectivity for Yb(III) in the presence of several metal ions. To investigate the sensor analytical applicability, it was tested as an indicator electrode in the potentiometric titration of Yb(III) solution with standard EDTA solution. The proposed electrode was also used to determine fluoride ions in mouthwash.

Keywords:

• Ion-selective electrode
• potentiometry
• PVC membrane
• sensor

The authors acknowledge the kind financial support provided by the Research Council of Quchan University for the preparation of this study.

Notes

^a Proposed Yb³⁺sensor.

^b Results are based on three measurements.