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https://open.uns.ac.rs/handle/123456789/11220
Title: | Application of potentiometric stripping analysis with constant inverse current for determining soluble lead in human teeth | Authors: | Kaličanin, Biljana Nikolić, Ružica Marjanović, Nikola |
Issue Date: | 1-Nov-2004 | Journal: | Analytica Chimica Acta | Abstract: | A method for the determination of soluble lead in human teeth by potentiometric stripping analysis with constant inverse current in the analytic step (PSA-iR), is described. The metal ions were concentrated as their amalgams on the glassy carbon surface of a working electrode that was previously coated with a thin mercury film and then stripped by a suitable oxidant. This paper examined effect of various factors on the PSA-iR results including the electrolysis potential, the solution stirring rate, and the constant inverse current. Quantitative analysis was carried out by both standard addition and calibration curve methods; a good linearity was obtained in the concentration range from 5 to 25 μg/dm3. A detection limit of 0.64 μg/dm3 was obtained, with a 5.21% coefficient of variation. Results obtained for teeth were not significantly different from these obtained by flameless atomic absorption spectrophotometry (FAAS). © 2004 Elsevier B.V. All rights reserved. | URI: | https://open.uns.ac.rs/handle/123456789/11220 | ISSN: | 00032670 | DOI: | 10.1016/j.aca.2004.05.080 |
Appears in Collections: | Naučne i umetničke publikacije |
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