Voltammetry Behavior of Cadmium (Ii) Ion at the Mercury Electrode in the Presence of Glutathione and Thioglycolic Acid.

Voltammetric behaviors of cadmium (II) ion in the presence of a ligand with sulphur bearing group, such as Glutathione {(COO- )(NH3 +(CH2)2CONHCH(CH2SH)CONH(CH2)(COO-)} and Thioglycolic acid (HSCH2COO-) were studied using mainly Osteryoung square wave voltammetry (OSWV)and Cyclic voltammetry (C...

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Main Author:	Zidan, Mohammed
Format:	Thesis
Language:	English English
Published:	2006
Subjects:	Voltammetry Glutathione Thioglycolic acid
Online Access:	http://psasir.upm.edu.my/id/eprint/121/1/549077_t_fs_2006_1.pdf
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id	my-upm-ir.121
record_format	uketd_dc
spelling	my-upm-ir.1212014-09-15T07:18:33Z Voltammetry Behavior of Cadmium (Ii) Ion at the Mercury Electrode in the Presence of Glutathione and Thioglycolic Acid. 2006-01 Zidan, Mohammed Voltammetric behaviors of cadmium (II) ion in the presence of a ligand with sulphur bearing group, such as Glutathione {(COO- )(NH3 +(CH2)2CONHCH(CH2SH)CONH(CH2)(COO-)} and Thioglycolic acid (HSCH2COO-) were studied using mainly Osteryoung square wave voltammetry (OSWV)and Cyclic voltammetry (CV) at a mercury electrode. The coordination chemistry of reduced glutathione (GSH) is of great importance as it acts as excellent model system for the binding of metal ions. In this study, it was observed that an addition of glutathione as ligand to solution containing Cd(II) with sulphate as supporting electrolyte caused an increase in the reduction current of Cd(II) by several factors and also with a slight cathodic shift in the reduction peak potential of Cd(II). Further assessment of the chemical and physical conditions that may favour optimum current enhancement was done by studying the effect of varying pH, supporting electrolyte, concentration of ligand and metal ion, interfering ions and scan rate. The presence of 1-3 mM glutathione, a weakly complexing supporting electrolyte at pH 4-5 caused a 2-3 fold increase in the reduction current of Cd(II) and a slight negative shift in peak position . The presence of 1-5mM TGA at pH5.3 caused 1-2 fold increase in the reduction current of Cd(II) and a slight negative shift in peak position. The current enhancement observed in different electrolytic media varied in the following order: sulphate >nitrate> perchlorate. The presence of other metal ion such as Cr(III) or Co(III) appear to cause further increase in the reduction current of the Cd(II)-glutathione peak while the presence of Ni(II) was found to suppress the enhanced peak current Voltammetry Glutathione Thioglycolic acid 2006-01 Thesis http://psasir.upm.edu.my/id/eprint/121/ http://psasir.upm.edu.my/id/eprint/121/1/549077_t_fs_2006_1.pdf application/pdf en public masters Universiti Putra Malaysia Voltammetry Glutathione Thioglycolic acid Faculty of Science English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Voltammetry Glutathione Thioglycolic acid
spellingShingle	Voltammetry Glutathione Thioglycolic acid Zidan, Mohammed Voltammetry Behavior of Cadmium (Ii) Ion at the Mercury Electrode in the Presence of Glutathione and Thioglycolic Acid.
description	Voltammetric behaviors of cadmium (II) ion in the presence of a ligand with sulphur bearing group, such as Glutathione {(COO- )(NH3 +(CH2)2CONHCH(CH2SH)CONH(CH2)(COO-)} and Thioglycolic acid (HSCH2COO-) were studied using mainly Osteryoung square wave voltammetry (OSWV)and Cyclic voltammetry (CV) at a mercury electrode. The coordination chemistry of reduced glutathione (GSH) is of great importance as it acts as excellent model system for the binding of metal ions. In this study, it was observed that an addition of glutathione as ligand to solution containing Cd(II) with sulphate as supporting electrolyte caused an increase in the reduction current of Cd(II) by several factors and also with a slight cathodic shift in the reduction peak potential of Cd(II). Further assessment of the chemical and physical conditions that may favour optimum current enhancement was done by studying the effect of varying pH, supporting electrolyte, concentration of ligand and metal ion, interfering ions and scan rate. The presence of 1-3 mM glutathione, a weakly complexing supporting electrolyte at pH 4-5 caused a 2-3 fold increase in the reduction current of Cd(II) and a slight negative shift in peak position . The presence of 1-5mM TGA at pH5.3 caused 1-2 fold increase in the reduction current of Cd(II) and a slight negative shift in peak position. The current enhancement observed in different electrolytic media varied in the following order: sulphate >nitrate> perchlorate. The presence of other metal ion such as Cr(III) or Co(III) appear to cause further increase in the reduction current of the Cd(II)-glutathione peak while the presence of Ni(II) was found to suppress the enhanced peak current
format	Thesis
qualification_level	Master's degree
author	Zidan, Mohammed
author_facet	Zidan, Mohammed
author_sort	Zidan, Mohammed
title	Voltammetry Behavior of Cadmium (Ii) Ion at the Mercury Electrode in the Presence of Glutathione and Thioglycolic Acid.
title_short	Voltammetry Behavior of Cadmium (Ii) Ion at the Mercury Electrode in the Presence of Glutathione and Thioglycolic Acid.
title_full	Voltammetry Behavior of Cadmium (Ii) Ion at the Mercury Electrode in the Presence of Glutathione and Thioglycolic Acid.
title_fullStr	Voltammetry Behavior of Cadmium (Ii) Ion at the Mercury Electrode in the Presence of Glutathione and Thioglycolic Acid.
title_full_unstemmed	Voltammetry Behavior of Cadmium (Ii) Ion at the Mercury Electrode in the Presence of Glutathione and Thioglycolic Acid.
title_sort	voltammetry behavior of cadmium (ii) ion at the mercury electrode in the presence of glutathione and thioglycolic acid.
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Science
publishDate	2006
url	http://psasir.upm.edu.my/id/eprint/121/1/549077_t_fs_2006_1.pdf
_version_	1747810141986619392

Voltammetry Behavior of Cadmium (Ii) Ion at the Mercury Electrode in the Presence of Glutathione and Thioglycolic Acid.

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