Journal article
Calibration of the Hg chalcogenide glass membrane ion-selective electrode in seawater media
Talanta, Vol.49(2), pp.385-391
1999
Abstract
It is shown that a chalcogenide glass mercury(II) ion-selective electrode (ISE) can be calibrated in chloride-free unbuffered and saline buffered standards, displaying near-Nernstian response over 19 orders of magnitude (i.e. 10-20 to 10-1 M Hg2+). Extended ageing of the ISE in seawater induced a memory effect, causing the electrode to respond in a sub- Nernstian fashion. Electrochemical impedance spectroscopy (EIS) demonstrated that the response of the Hg(II) ISE is underpinned by a charge transfer process, and seawater matrix effects are due to electrode passivation. It is shown that standard addition ISE potentiometry may compensate for interferences caused by the seawater matrix.
Details
- Title
- Calibration of the Hg chalcogenide glass membrane ion-selective electrode in seawater media
- Authors
- Roland De Marco (Author) - Curtin University of TechnologyJ Shackleton (Author) - Curtin University of Technology
- Publication details
- Talanta, Vol.49(2), pp.385-391
- Publisher
- Elsevier BV
- Date published
- 1999
- DOI
- 10.1016/S0039-9140(99)00003-X
- ISSN
- 0039-9140
- Organisation Unit
- University of the Sunshine Coast, Queensland; Office of the Deputy Vice-Chancellor (Research and Innovation)
- Language
- English
- Record Identifier
- 99449963602621
- Output Type
- Journal article
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- Web Of Science research areas
- Chemistry, Analytical