A solid-contact ion selective electrode for copper(II) using a succinimide derivative as ionophore.

Mihaela Dana Tutulea-Anastasiu,Deivy Wilson,Cristina Mihaela Schreiner,Igor Cretescu,Manel Del Valle

doi:10.3390/s130404367

Abstract

All-solid-state sensors with polyvinyl chloride (PVC)-based membranes using off-the-shelf N-hydroxysuccinimide (NHS) and succinimide (Succ) ionophores were prepared using DOP (dioctyl phthalate) and NPOE (ortho-nitrophenyloctyl ether) as plasticizers. Good responses were obtained when NHS was used. The potentiometric response of the proposed electrode is independent of pH over the range 2–6. The electrode shows a fast response time of 0.25 s. The electrode exhibits a Super-Nernstian response, with 37.5 mV/decade, with a potentiometric detection limit of 4.4 μM. The proposed sensor revealed good selectivity towards a group of transition metal ions.

Highlights

Copper is known to be an essential element for health, but even in low concentrations, copper ions are toxic to all organisms and its determination is an important analytical task [1,2]
The potentiometric response of all solid state contact Cu(II)-selective electrodes prepared with DOP
NPOE was evaluated in the concentration range of 10−8 to 10−2 M, against a double distilled water blank

Summary

Introduction

Copper is known to be an essential element for health, but even in low concentrations, copper ions are toxic to all organisms and its determination is an important analytical task [1,2]. Sensors 2013, 13 accumulation of copper(II) in the environment from numerous industrial sources, poses a danger to public health [3]. The determination of trace amounts of copper(II) has become more and more important because of the increased interest in environmental pollution [4]. In order to estimate its deficiency or accumulation in various samples, sensitive, reproducible and accurate analytical methods are required [5]. Have been applied for the determination of copper(II) ions. Pyrrole [18], polyindole [19], salens [20], 3,6,9,14-tetrathiabicyclo [9.2.1]tetradeca-11,13-diene [21], aza-thioether crowns [22], 4-phenyl11-decanoyl-1,7-dithia-11-azacyclotetradecane-4-sulfide [23], 4-phenyl-4-sulfide-11-(1-oxodecyl)-1, 7-dithia-11-aza-4-phosphacyclotetradecane [24], copper sulphide [25], 5,6,7,8,9,10-hexahydro-2H1,13,4,7,10-benzodioxatriazacyclopentadecine-11(4H,12H)-dione [26] were used as electroactive materials in different copper(II) selective membrane sensors

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Conclusion