Logo image
Back
Response of the Jalpaite Membrane Copper(II) Ion-Selective Electrode in Marine Waters
Journal article   Peer reviewed

Response of the Jalpaite Membrane Copper(II) Ion-Selective Electrode in Marine Waters

Roland De Marco, D J Mackey and A Zirino
Electroanalysis, Vol.9(4), pp.330-334
1997
DOI: https://doi.org/10.1002/elan.1140090414
url
https://doi.org/10.1002/elan.1140090414View
Published Version

Abstract

copper ion-selective electrode natural water speciation stripping voltammetry
The response of the Orion 94-29 CuII ion-selective electrode (ISE) [employing a jalpaite membrane] in seawater has been related to levels of free CuII yielding results for the Derwent River and San Diego Bay that are 2 to 3 orders of magnitude higher than those for the Pacific Ocean. Response data for the electrode in acidified seawater at pH 2 are internally consistent with total CuII levels determined using differential pulse anodic stripping voltammetry (DPASV) and graphite furnace atomic absorption spectrometry (GFAAS). It has been found that, even in acidified seawater, the organic ligands influence the response of the electrode, and this effect can be compensated successfully by either analyzing UV-photooxidized seawater and/or using a standard addition technique. The assigned ISE results for total CuII in acidified seawater fall within±(0.1-0.5) pCu unit of values determined using GFAAS. Electrode drift in seawater can be minimized by using a polished electrode that has been conditioned in seawater for 24 h. The improved response rate of a conditioned ISE minimizes electrode soaking times and sample contamination through membrane corrosion.

Details

Metrics

727 Record Views
50 Times Cited - Web of Science

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Collaboration types
Domestic collaboration
International collaboration
Web Of Science research areas
Chemistry, Analytical
Electrochemistry
Logo image