Direct measurement of Cu(II)(aq) in seawater at pH 8 with the jalpaite ion-selective electrode

A Zirino; D A VanderWeele; S L Belli; Roland De Marco; D J Mackey

doi:10.1016/S0304-4203(97)00108-4

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Direct measurement of Cu(II)(aq) in seawater at pH 8 with the jalpaite ion-selective electrode

Journal article

Peer reviewed

Direct measurement of Cu(II)(aq) in seawater at pH 8 with the jalpaite ion-selective electrode

A Zirino, D A VanderWeele, S L Belli, Roland De Marco and D J Mackey

Marine Chemistry, Vol.61(3-4), pp.173-184

1998

DOI: https://doi.org/10.1016/S0304-4203(97)00108-4

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Abstract

Oceanography

Geochemistry

Other Chemical Sciences

measurement

seawater

copper

ion-selective electrode

The variability of measurement of the pCu of seawater at pH 8 was studied using up to 5 similar Orion 90-24, jalpaite-based electrodes. Large variability (ca. 1 pCu unit) among the values yielded by the individual electrodes was observed when the electrodes were stored in artificial seawater and exposed to light including sunlight This variability is in agreement with mechanisms proposed previously. The variability among the electrodes was reduced to about +/-0.2 pCu units when the electrodes were stored in sacrificial EN seawater solution and shielded from light. Eight measurements of San Diego Bay seawater made with an individual electrode yielded pCu = 12.23 +/-:0.06 (1 sigma) regardless of the order in which the electrode was calibrated with standard buffer solutions. This degree of precision makes it possible to follow the small, time-dependent changes in the pCu of seawater. The effects of electrode rotation and the adsorption or desorption of organic matter on the electrode are presented and discussed. (C) 1998 Elsevier Science B.V. All rights reserved.

Details

Title: Direct measurement of Cu(II)(aq) in seawater at pH 8 with the jalpaite ion-selective electrode
Authors: A Zirino (Author) - SPAWAR Systems Center, United States
D A VanderWeele (Author) - SPAWAR Systems Center, United States
S L Belli (Author) - SPAWAR Systems Center, United States
Roland De Marco (Author) - Curtin University of Technology
D J Mackey (Author) - CSIRO Division of Oceanography
Publication details: Marine Chemistry, Vol.61(3-4), pp.173-184
Publisher: Elsevier BV
Date published: 1998
DOI: 10.1016/S0304-4203(97)00108-4
ISSN: 0304-4203; 0304-4203
Organisation Unit: University of the Sunshine Coast, Queensland; Office of the Deputy Vice-Chancellor (Research and Innovation)
Language: English
Record Identifier: 99448731402621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Chemistry, Multidisciplinary; Oceanography