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Applicability of chemically modified electrodes for determination of copper species in natural waters

✍ Scribed by J. Labuda; M. Vanǹičková; E. Uhlemann; W. Mickler

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
589 KB
Volume
284
Category
Article
ISSN
0003-2670

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✦ Synopsis

A procedure based on the stripping voltammetric determination of labile copper after its chemical accumulation on a graphite electrode modified with a complexation agent and a Nafion fihn is described. The method is sufficiently sensitive for the copper determination in the nM to PM range with a relative standard deviation of 1 to 6%. The detection window of the proposed technique is similar to that of conventional differential pulse polarography. Results for the copper speciation and the copper complexation capacity in model samples and in river waters are presented. A mathematical description of competitive complexation equilibria is discussed.

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