Publications (2)0 Total impact
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ABSTRACT: Chemically modified carbon paste eletrodes are prepared by incorporating appropriate quantities of a cation-exchange resin directly into the paste mixture. Ionic analytes can be preconcentrated on these electrodes by an ion-exchange reaction rather than electrolytic plating. Differential pulse voltammetry is used to quantify the accumulated ions. The response is characterized with respect to preconcentration period, bulk concentration, pH, paste composition, reproducibility, and other variables. Copper ion is used as a test system. The procedure exhibits good linearity for 6.25 × 10−5−3.0 × 10−4 M copper(II) ions and the peak current varies linearly with preconcentration time between 1 and 7 min for the conditions used.Analytica Chimica Acta. 01/1984;
- Journal of Electroanalytical Chemistry - J ELECTROANAL CHEM. 01/1983; 154:261-268.
New Mexico State University
Las Cruces, NM, United States
- Department of Chemistry and Biochemistry