Wibowo, Wendy Anugerah Putra (2925) Screen Printed Carbon Elektrode (SPCE) Termodifikasi Nanopartikel Logam Untuk Deteksi Metabolit Sekunder Indikator Infeksi Ganoderma Boninense Pada Kelapa Sawit. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini mengembangkan sensor elektrokimia berbasis Screen Printed Carbon Electrode (SPCE) yang dimodifikasi dengan nanopartikel logam emas (Au), perak (Ag), dan platinum (Pt) untuk deteksi metabolit sekunder sebagai indikator infeksi Ganoderma boninense pada kelapa sawit. Nanopartikel Au disintesis menggunakan metode reduksi kimia sedangkan nanopartikel Ag dan Pt menggunakan metode hidrotermal. Karakterisasi struktur dan gugus fungsi dilakukan menggunakan Ultraviolet Visible Spectroscopy (UV-vis), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), dan Scanning Electron Microscopy (SEM). Modifikasi permukaan elektroda dilakukan dengan nanokomposit berbasis reduced Graphene Oxide (rGO) dan logam yang dievaluasi menggunakan Cyclic Voltammetry (CV), Electrochemical Impedance Spectroscopy (EIS), Four-Point Probe, Differential Pulse Voltammetry (DPV), dan Chronoamperometry. Hasil menunjukkan bahwa SPCE termodifikasi Pt/rGO (1 wt%) memiliki performa terbaik dengan sensitivitas masing masing untuk fitol 2,220 μA/mM dan 1,801 μA/μM untuk stigmasterol, Limit of Detection (LoD) sebesar 1,915 mM dan 0.505 μM, serta Limit of Quantification (LoQ) sebesar 5,805 mM dan 1,532 mikroM. Selain itu, waktu respon sensor juga terdeteksi dengan cepat (t = 1.28s). perbedaan konsentrasi analit disesuaikan dengan perbedaan kelarutan serta kestabilan larutan masing-masing senyawa secara visual. Dengan sensitivitas tinggi, waktu respon cepat, dan biayanya yang rendah, sensor ini berpotensi menjadi solusi portabel dan selektif untuk deteksi dini infeksi Ganoderma boninense dalam perkebunan kelapa sawit.
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This study developed an electrochemical sensor based on Screen-Printed Carbon Electrode (SPCE) modified with metal nanoparticles of gold (Au), silver (Ag), and platinum (Pt) for the detection of secondary metabolites as indicators of Ganoderma boninense infection in oil palm plantations. Au nanoparticles were synthesized using a chemical reduction method, while Ag and Pt nanoparticles were prepared via a hydrothermal process. Structural and functional group characterizations were carried out using Ultraviolet–Visible Spectroscopy (UV-Vis), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), and Scanning Electron Microscopy (SEM). The electrode surface was modified with reduced Graphene Oxide (rGO)–metal nanocomposites and evaluated using Cyclic Voltammetry (CV), Electrochemical Impedance Spectroscopy (EIS), Four-Point Probe, Differential Pulse Voltammetry (DPV), and Chronoamperometry. The SPCE modified with Pt/rGO (1 wt%) exhibited the best performance, with sensitivities of 2.220 μA/mM for phytol and 1.801 μA/μM for stigmasterol, a limit of detection (LoD) of 1.915 mM and 0.505 μM, and a limit of quantification (LoQ) of 5.805 mM and 1.532 μM. Additionally, the sensor showed a rapid response time (t = 1.28 s). The analyte concentration range was adjusted based on the solubility and visual stability of each solution. With high sensitivity, fast response, and low cost, this sensor shows potential as a portable and selective early detection tool for Ganoderma boninense infections in oil palm monitoring systems.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Ganoderma boninense, Kelapa Sawit, Metabolit Sekunder, Nanopartikel Logam, SPCE, Ganoderma boninense, Oil Palm, Secondary Metabolites, Metal Nanoparticles, SPCE |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA1573 Detectors. Sensors |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | Wendy Anugerah Putra Wibowo |
| Date Deposited: | 14 Jul 2025 06:40 |
| Last Modified: | 14 Jul 2025 06:40 |
| URI: | http://repository.its.ac.id/id/eprint/119678 |
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