Highly sensitive and selective electrochemical sensor for the trace level detection of mercury and cadmium | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

4682636

Reference Type

Journal Article

Title

Highly sensitive and selective electrochemical sensor for the trace level detection of mercury and cadmium

Author(s)

Shah, A; Sultan, S; Zahid, A; Aftab, S; Nisar, Jan; Nayab, S; Qureshi, R; Khan, GulS; Hussain, H; Ozkan, SA

Year

2017

Is Peer Reviewed?

Yes

Journal

Electrochimica Acta
ISSN: 0013-4686

Volume

258

Page Numbers

1397-1403

DOI

10.1016/j.electacta.2017.12.002

Web of Science Id

WOS:000418324800154

Abstract

In the present work we report the development of a novel electrochemical sensor associated with high sensitivity, selectivity, cost affordability and fast sensing ability. We used 1-phenyl-N-(pyridin-2-ylmethyl) ethanamine (PPE) as a recognition layer over the surface of glassy carbon electrode for the trace level detection of mercuric (Hg2+) and cadmium (Cd2+) ions. The effects of pH, temperature, concentration of the modifier, accumulation time, deposition potential and supporting electrolytes were examined to optimize conditions for achieving the best sensing response of the analytes. The designed sensors demonstrated good percentage recovery, remarkable electrocatalytic activity and excellent discrimination ability for the target analytes in the presence of interfering metal ions. The wide linearity range and quite lower detection limits of 0.1 nM and 0.8 nM for Hg+2 and Cd+2 ions suggested the promising candidature of the designed sensor for monitoring heavy metal ions in aqueous systems. (C) 2017 Elsevier Ltd. All rights reserved.

Keywords

Electrochemical sensor; Toxic metal ions; Sensitivity; Selectivity; pH