A Polarographic Study of Chlorogenic Acid and Its Interaction with Some Heavy Metal Ions
The behavior of chlorogenic acid (CGA) and its interaction with Hg(II), Pb(II), Cu(II), Cd(II) and Zn(II) has been studied using direct current (DC) and differential‐pulse polarography (DPP). Adsorptive and kinetic/catalytic anodic waves of CGA have been detected at −0.02 and −0.18 V vs. SCE, respec...
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Published in | Electroanalysis (New York, N.Y.) Vol. 23; no. 12; pp. 2935 - 2940 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
01.12.2011
WILEY‐VCH Verlag |
Subjects | |
Online Access | Get full text |
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Summary: | The behavior of chlorogenic acid (CGA) and its interaction with Hg(II), Pb(II), Cu(II), Cd(II) and Zn(II) has been studied using direct current (DC) and differential‐pulse polarography (DPP). Adsorptive and kinetic/catalytic anodic waves of CGA have been detected at −0.02 and −0.18 V vs. SCE, respectively; Hg(I)‐CGA surface disproportionation has been assumed. Reduction of Hg(II)‐ions, added in the buffered solution of CGA (pH 7.5), occurs rather than complexation, while the complex forming ability of CGA towards Pb(II) and Cu(II) has been observed. Stoichiometry 1 : 1 for Pb(II)‐CGA, and 1 : 1 and 1 : 2 for Cu(II)‐CGA has been established applying Job’s method of continuous variation on DPP data. UV‐vis spectrophotometric measurements additionally confirmed the existence and stoichiometry of Cu(II) complexes. |
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Bibliography: | ark:/67375/WNG-VPSR52TM-2 ArticleID:ELAN201100476 Ministry of Sciences and Technological Development - No. 31093 and 043010 istex:1E29837204437BCE39A60B3C38FA5A3749CC9735 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 1040-0397 1521-4109 |
DOI: | 10.1002/elan.201100476 |