ISSN:
1040-0397
Keywords:
Selenium
;
Stripping voltammetry
;
Carbon fiber
;
Mercury film
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The conditions for the deposition of mercury on the surface of carbon fibers to permit the sensitive and reproducible voltammetry of Se(IV) have been investigated. Several procedures employing both predeposition and in situ formation of a mercury film on the carbon fiber were evaluated, and the effect of the mercury concentration and plating time upon the sensitivity of the stripping response for Se(IV) was determined. Due to the steady-state diffusional mass transport characteristics exhibited by these electrodes, the need for stirred solutions, a specific deposition potential, and a deposition time period in the stripping voltammetric procedure was eliminated. This procedure gave rise to a linear response up to 3 ng/ml, a detection limit of 0.11 ng/ml, and a relative standard deviation (RSD) of 4.4% at 5 ng/ml (n = 5) for determination of Se(IV).
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/elan.1140050513
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