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Composite Graphite Ion Selective Electrode Array Potentiometry for the Detection of Mercury and Other Relevant Ions in Aquatic Systems

Document Type

Article

Abstract

Simultaneous detection of many ions in situ offers advantages in environmental monitoring, including the ability to distinguish a variety of complexed species. We demonstrate here a small mercury ion selective electrode responsive to changing halide concentrations, interpretable as mercury halide speciation in solution. We also present an array of similarly constructed small halide-detecting electrodes capable of differentiating halides and sulfide activities. These are a necessary first step toward development of an ion selective microelectrode array for speciation detection of heavy metals in natural waters. Electrodes consist of a composite of a conductive epoxy and an insoluble salt of the species to be detected. Electrodes studied have an easily renewable surface of approximately 13 mm2. © 1995, American Chemical Society. All rights reserved.

Publication Title

Analytical Chemistry

Publication Date

1-1-1995

Volume

67

Issue

6

First Page

1147

Last Page

1151

ISSN

0003-2700

DOI

10.1021/ac00102a020

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