| dc.creator |
Sardohan Köseoğlu, Tuğba,
1982-
author
15657 |
|
| dc.creator |
Kır, Esengül,
1970-
thesis advisor
15165 |
|
| dc.creator |
Süleyman Demirel Üniversitesi.
Fen Bilimleri Enstitüsü.
Kimya Anabilim Dalı.
issuing body
9868 |
|
| dc.date |
2011. |
|
| dc.identifier |
http://tez.sdu.edu.tr/Tezler/TF01663.pdf |
|
| dc.description |
The main goal of this thesis was to develop a novel Hg(II)-selective solid state electrode without internal filling solution by using various oxime compounds as ionophores. Experiments on performance and analytical applicability of electrodes were conducted. As a result of the experiments, it is understood that the oximes employed in this study can be used as ionophores in the manufacturing of Hg(II)- selective electrode. In the scope of determining electrode specifications; effects of the species and ratios of ionophore, plasticizer, PVC and lipophilic additive on the potentiometric response of electrodes were investigated. Hence, optimum membrane composition was tried to reveal. It was found that the, 4% ionophore, 64% plasticizer (o-NPOE), 31% PVC, and 1% lipophilic additive (NaTPB) was the recipe of the optimum membrane composition. It was revealed that performance of the electrodes was dependent on the solution pH and the optimum pH range was 4.0-9.0. Electrodes have fast response duration (10- 15 sec.) and lifetime up to 1 month. It was found that electrodes have detection limit between 1.68x10-6-2.44x10-6 M and have linear responses of 32.8-37.6 mV/pHg2+ for the concentration range of 1.0x10-2-1.0x10-6 M for Hg(II) ions. Besides Hg(II) ions, selectivity coefficients of the studied electrodes for several cations were calculated by fixed interference method (FIM). Results overall suggested that, except Na(I), NH4(I), Hg(I) and Ag(I) ions, electrodes were ultimately selective to Hg(II) ions in the presence of Cu(II), Pb(II), Cd(II), Zn(II), Mg(II), Li(I), Mn(II), Ni(II), Co(II), Ca(II), Cr(III), and Fe(III) ions. Thus, Na(I), NH4(I), Hg(I) and Ag(I) ions were accepted as the interfering ions for the studied electrodes. Analytical applications of the electrodes were also performed. Developed electrodes was successfully used as indicator electrodes in the potentiometric titration of Hg(II) ion with EDTA solution. In addition electrodes were tested in the several samples. Hg(II) determining capacity of the electrodes was tested in the various water samples (deionized water, tap water and mineral water) with external Hg(II) addition and dental amalgam. Results underline the successful characteristics of the novel electrodes. Key Words: Hg(II) Ion, Ion-Selective Electrodes, Oxime, Potentiometry, Solid State Electrode |
|
| dc.description |
Tez (Doktora)- Süleyman Demirel Üniversitesi, Fen Bilimleri Enstitüsü, Kimya Anabilim Dalı, 2011. |
|
| dc.description |
Kaynakça var. |
|
| dc.description |
The main goal of this thesis was to develop a novel Hg(II)-selective solid state electrode without internal filling solution by using various oxime compounds as ionophores. Experiments on performance and analytical applicability of electrodes were conducted. As a result of the experiments, it is understood that the oximes employed in this study can be used as ionophores in the manufacturing of Hg(II)- selective electrode. In the scope of determining electrode specifications; effects of the species and ratios of ionophore, plasticizer, PVC and lipophilic additive on the potentiometric response of electrodes were investigated. Hence, optimum membrane composition was tried to reveal. It was found that the, 4% ionophore, 64% plasticizer (o-NPOE), 31% PVC, and 1% lipophilic additive (NaTPB) was the recipe of the optimum membrane composition. It was revealed that performance of the electrodes was dependent on the solution pH and the optimum pH range was 4.0-9.0. Electrodes have fast response duration (10- 15 sec.) and lifetime up to 1 month. It was found that electrodes have detection limit between 1.68x10-6-2.44x10-6 M and have linear responses of 32.8-37.6 mV/pHg2+ for the concentration range of 1.0x10-2-1.0x10-6 M for Hg(II) ions. Besides Hg(II) ions, selectivity coefficients of the studied electrodes for several cations were calculated by fixed interference method (FIM). Results overall suggested that, except Na(I), NH4(I), Hg(I) and Ag(I) ions, electrodes were ultimately selective to Hg(II) ions in the presence of Cu(II), Pb(II), Cd(II), Zn(II), Mg(II), Li(I), Mn(II), Ni(II), Co(II), Ca(II), Cr(III), and Fe(III) ions. Thus, Na(I), NH4(I), Hg(I) and Ag(I) ions were accepted as the interfering ions for the studied electrodes. Analytical applications of the electrodes were also performed. Developed electrodes was successfully used as indicator electrodes in the potentiometric titration of Hg(II) ion with EDTA solution. In addition electrodes were tested in the several samples. Hg(II) determining capacity of the electrodes was tested in the various water samples (deionized water, tap water and mineral water) with external Hg(II) addition and dental amalgam. Results underline the successful characteristics of the novel electrodes. Key Words: Hg(II) Ion, Ion-Selective Electrodes, Oxime, Potentiometry, Solid State Electrode |
|
| dc.language |
tur |
|
| dc.publisher |
Isparta : SDÜ Fen Bilimleri Enstitüsü, |
|
| dc.subject |
Süleyman Demirel Üniversitesi |
|
| dc.title |
Oksimler kullanılarak iyon seçici elektrot hazırlanması = Preparation of ion-selective electrode by using oximes / |
|
| dc.type |
text |
|