Determination of zinc by square-wave adsorptive stripping voltammetry using alizarin as a chelating agent
Author
Source
Journal of Saudi Chemical Society
Issue
Vol. 14, Issue 1 (31 Mar. 2010), pp.1-7, 7 p.
Publisher
Publication Date
2010-03-31
Country of Publication
Saudi Arabia
No. of Pages
7
Main Subjects
Topics
Abstract EN
The adsorptive collection of zinc (II) complex with alizarin ligand, coupled with the square-wave voltammetric technique at the hanging mercury drop electrode, yields a very sensitive electro analytical procedure for the determination of zinc.
The optimized experimental conditions include : supporting electrolyte (carbonate buffer), pH (11), alizarin concentration (1 x 10-6! mol 1-1), accumulation time (60 s), accumulation potential (—0.1 V), scan rate (700 mV s-1), pulse amplitude (0.06 V) and SW frequency (80 Hz).
The monitored stripping voltammetric current was linear over the range of 5 x 10-8-4 x 10-7 mol 1-1 and the detection limit was 1 x 10-8mol l-1.
The relative standard deviation was calculated as 1.3% (n = 10) for 1 x 10-8 mol l-1 Zn(II) and the obtained electrochemical signal was stabile for up to 60 min.
Possible interferences by either coexisting metal ions or other chelating agents were also investigated.
The applicability of the proposed SW-AdSV method to the analysis of foodstuff was assessed by the determination of zinc content in instant coffee samples.
The accuracy of the obtained voltammetric analytical results was validated by comparing with that obtained by atomic absorption spectrometric method and conducting the necessary statistical evaluation.
American Psychological Association (APA)
al-Ghamidi, Ahmad H.. 2010. Determination of zinc by square-wave adsorptive stripping voltammetry using alizarin as a chelating agent. Journal of Saudi Chemical Society،Vol. 14, no. 1, pp.1-7.
https://search.emarefa.net/detail/BIM-250648
Modern Language Association (MLA)
al-Ghamidi, Ahmad H.. Determination of zinc by square-wave adsorptive stripping voltammetry using alizarin as a chelating agent. Journal of Saudi Chemical Society (Mar. 2010), pp.1-7.
https://search.emarefa.net/detail/BIM-250648
American Medical Association (AMA)
al-Ghamidi, Ahmad H.. Determination of zinc by square-wave adsorptive stripping voltammetry using alizarin as a chelating agent. Journal of Saudi Chemical Society. 2010. Vol. 14, no. 1, pp.1-7.
https://search.emarefa.net/detail/BIM-250648
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 7
Record ID
BIM-250648