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Sensors 2012, 12(11), 14968-14982; doi:10.3390/s121114968

Flow Injection Analysis of Mercury Using 4-(Dimethylamino) Benzaldehyde-4-Ethylthiosemicarbazone as the Ionophore of a Coated Wire Electrode

Pusat Pengajian Sains Kimia, Universiti Sains Malaysia, 11800 USM P. Pinang, Malaysia
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Received: 16 August 2012 / Revised: 29 September 2012 / Accepted: 19 October 2012 / Published: 6 November 2012
(This article belongs to the Section Chemical Sensors)
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Abstract

A flow injection analysis (FIA) incorporating a thiosemicarbazone-based coated wire electrode (CWE) was developed method for the determination of mercury(II). A 0.1 M KNO3 carrier stream with pH between 1 and 5 and flow rate of 1 mL·min−1 were used as optimum parameters. A linear plot within the concentration range of 5 × 10−6–0.1 M Hg(II), slope of 27.8 ± 1 mV per decade and correlation coefficient (R2) of 0.984 were obtained. The system was successfully applied for the determination of mercury(II) in dental amalgam solutions and spiked environmental water samples. Highly reproducible measurements with relative standard deviation (RSD < 1% (n = 3)) were obtained, giving a typical throughput of 30 samples·h−1. View Full-Text
Keywords: coated wire electrode; 4-(dimethylamino) benzaldehyde-4-ethylthiosemicarbazone; mercury(II) ion-selective electrode; flow injection analysis coated wire electrode; 4-(dimethylamino) benzaldehyde-4-ethylthiosemicarbazone; mercury(II) ion-selective electrode; flow injection analysis
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Tahir, T.F.; Salhin, A.; Ghani, S.A. Flow Injection Analysis of Mercury Using 4-(Dimethylamino) Benzaldehyde-4-Ethylthiosemicarbazone as the Ionophore of a Coated Wire Electrode. Sensors 2012, 12, 14968-14982.

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