Tropolone Modified Carbon Paste Electrodes For Trace Measurements of Tin
- 1 March 1989
- journal article
- research article
- Published by Taylor & Francis in Analytical Letters
- Vol. 22 (3), 719-727
- https://doi.org/10.1080/00032718908051359
Abstract
Tin-sensitive chemically modified electrodes were constructed by incorporating the ligand tropolone into the carbon paste matrix. Tin is rapidly collected onto the electrodes and the resulting surfaces are characterized by cyclic and differential pulse voltammetry. the differential pulse peak current, at-0.81V, is ca. 40-fold larger than the corresponding peak at the plain carbon paste electrode. Linear calibration curves are obtained for tin concentrations ranging from 4 to 52 mg/l. the detection limit is 0.2 mg/l. Rapid renewal of the surface allows use of a single electrode in multiple determinations. the relative standard deviation (at the 7 mg/l level) is 2.0%. Interference effects are reported.Keywords
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