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Current Analytical Chemistry

Editor-in-Chief

ISSN (Print): 1573-4110
ISSN (Online): 1875-6727

Research Article

A Novel all Solid-State Contact PVC-Membrane Beryllium-Selective Electrode Based on 4-Hydroxybenzo-15-Crown-5 Ether Ionophore

Author(s): Ibrahim Isildak*, Azade Attar, Ersin Demir, Baris Kemer and Hassan Y. Aboul-Enein*

Volume 14, Issue 1, 2018

Page: [43 - 48] Pages: 6

DOI: 10.2174/1573411012666161014164546

Price: $65

Abstract

Aim: A novel all solid-state contact PVC-membrane beryllium-selective electrode based on 4-hydroxybenzo-15-crown-5 ether as an ionophore is described.

Results: The best performance was obtained with a membrane composition of 4% ionophore, 67% dioctyl sebacate (DOS), 28% poly(vinyl chloride) (PVC), and 1% potassium tetrakis (p-chloro)phenylborate (KTClPB) (w/w). The all solid-state contact PVCmembrane beryllium-selective electrode together with an Ag/AgCl reference electrode exhibited sub-Nernstian response with a slope of 22±1 mV/decade to beryllium ions from 1.0x10-6 to 1.0x10-1 M, and resulted a considerably low detection limit of 6.2x10 7. The electrode had a good performance in selectivity over a wide range of interfering cations tested. It showed a working pH range between 4.0-8.2 with fast response time (<10 s) and a good reproducibility.

Conclusion: The all solid-state contact PVC-membrane beryllium-selective electrode developed was successfully applied in potentiometric titration of Be2+ ions with EDTA.

Keywords: Beryllium-selective electrode, 4-hydroxybenzo-15-crown-5 ether, potentiometry, PVC membrane, ionophore, EDTA.

Graphical Abstract


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