Rahayu, Anita Muji (2012) Modifikasi Elektroda Emas dengan Polipirol/Emas Nanopartikel untuk Penentuan Kromium. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Modifikasi elektroda emas telah dilakukan dengan polipirol dan emas nanopartikel. Elektroda emas termodifikasi digunakan untuk oenentuan kromium dengan pelarut buffer asetat pH 5. Modifikasi pirol dilakukan secara elektropolimerisasi voltametri siklis dengan larutan elektrolit pendukung KC1 0,1 M dan teknik Layer by Layer (LBL) untuk modifikasi emas nanopartikel. Elektroda emas tanpa modifikasi tidak memberikan pola arus yang teratur seiring meningkatnya konsentrasi kromium. Elektroda yang telah termodifikasi memberikan kenaikan sinyal arus seiring kenaikan konsentrasi kromium. Sinyal arus katodik elektroda emas polipirol terjadi pada potensial 0,464 V dengan sensitivitas sebesar 0,085 pA.pM'1.mm'2 dan limit deteksi sebesar 13,48 pM. Sinyal arus katodik elektroda emas polipirol/emas nanopartikel terjadi pada potensial 0,604 V dengan sensitivitas sebesar 0,234 pA.pM'.mm dan limit deteksi sebesar 12,31 pM Elektroda emas polipirol/emas nanopartikel menunjukkan respon puncak katodik lebih tinggi dibandingkan dengan elektroda emas termodifikasi pirol dan elektroda emas tanpa modifikasi.
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Modifications of gold electrode have been made by using polypyrrole and gold nanoparticles. The modified gold electrode was used for the determination of chromium ion in acetate buffer pH 5. Deposition of polypirrole on gold surface was made by electropolymerization using cyclic voltammetry technique in KC1 0.1 M as supporting electrolyte. The modification of electrode was continued by addition of gold nanoparticles using Layer by Layer (LBL) deposition. Signals of gold electrode, polypirrole modified gold electrode, and polypirrole/gold nanoparticles modified gold electrode for determination of chromium ion were compared. The gold electrode showed no response to chromium ion. Responses of the polypirrole modified gold electrode and the polypirrole/gold nanoparticles modified gold electrode showed increased with the increasing of chromium ion concentration. The reduction potential of polypirrole modified gold electrode was 0,464 V, the limit of detection and sensitivity of the electrode are 13,48 pM and 0,085 pA.pM '.mm'2 respectively. The reduction potential of the polypyrrole/gold nanoparticles modified gold electrode was 0,604 V, the limit of detection and the sensitivity are 12,31 pM and 0,234 pA.pM'1.mm'2 respectively.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | emas nanopartikel, kromium, polipirol,voltametri siklis, gold nanoparticles, chromium, polypirrol, cyclic voltammetry. |
| Subjects: | Q Science > QD Chemistry > QD481 Chemical structure. |
| Divisions: | Faculty of Mathematics and Science > Chemistry > 47201-(S1) Undergraduate Thesis |
| Depositing User: | magang . |
| Date Deposited: | 20 Oct 2026 04:07 |
| Last Modified: | 20 Oct 2026 04:07 |
| URI: | http://repository.its.ac.id/id/eprint/145702 |
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