Rimansa, Salwa Amalia Putri (2025) Analisis Perbandingan Reduktor Hidroksilamin Hidroklorida, Asam Oksalat Dan Gambir (Uncaria Gambir) Pada Penentuan Besi Dengan Metode Spektrofotometri UV-Vis. Other thesis, Institut Teknologi Sepuluh Nopember.
![[thumbnail of 5004211021-Undergraduated_Thesis.pdf]](http://repository.its.ac.id/style/images/fileicons/text.png) |
Text
5004211021-Undergraduated_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (2MB) | Request a copy |
Abstract
Penelitian ini bertujuan untuk mengetahui kondisi optimum agen pereduksi dengan membandingkan pereduksi hidroksilamin hidroklorida (NH2OH.HCl), asam oksalat (H2C2O4), dan gambir (Uncaria gambir) dalam mereduksi besi (Fe3+) menjadi besi (Fe2+) yang selanjutnya dianalisis menggunakan metode spektrofotometri UV-Vis dengan pereaksi kompleksasi 1,10 Fenantrolin. Reaksi reduksi dilakukan dalam kondisi optimum, termasuk pengaturan pH menggunakan buffer asetat, waktu pembentukan kompleks, dan konsentrasi reduktor yang paling efektif. Hasil pengukuran menunjukkan bahwa panjang gelombang maksimum dari kompleks Fe(II)-Fenantrolin yang terbentuk saat digunakan ketiga jenis pereduksi yaitu sebesar 510 nm. Optimasi pH untuk pereduksi NH2OH.HCl dan H2C2O4 diperoleh pada pH 4,5 sedangkan pada pereduksi gambir pada pH 5. Selanjutnya aktivitas optimum konsentrasi untuk pereduksi NH2OH.HCl diperoleh pada konsentrasi 6 ppm, untuk pereduksi H2C2O4 diperoleh pada konsentrasi 4 ppm sedangkan pereduksi gambir diperoleh pada konsentrasi 8 ppm. Kemudian untuk aktivitas optimum waktu pendiaman untuk pereduksi NH2OH.HCl diperoleh pada waktu pendiaman 30 menit, H2C2O4 diperoleh pada waktu pendiaman 225 menit sedangkan pereduksi gambir diperoleh pada waktu pendiaman 90 menit. Pengukuran kurva kalibrasi pada pereduksi NH2OH.HCl, H2C2O4 dan gambir memiliki nilai koefisien determinasi (R2) berturut- turut sebesar 0,9984; 0,9961; 0,9984 dengan hasil recovery 86,238%; 89,387%; 85,048%.
==============================================================================================================================================
This study aims to determine the optimal conditions for reducing agents by comparing hydroxylamine hydrochloride (NH2OH.HCl), oxalic acid (H2C2O4), and gambir (Uncaria gambir) in reducing iron (Fe3+) to iron (Fe2+), which is then analyzed using the UV-Vis spectrophotometri method with the complexing reagent 1,10-phenanthroline. The reduction reaction was conducted under optimal conditions, including pH adjustment using acetic acid buffer, complex formation time, and the bost effective reducer concentration. The measurement results showed that the maximum wavelength of the Fe(II)-phenanthroline complex formed when using the three types of reducing agents was 510 nm. pH optimization for the reducing agents NH2OH.HCl and H2C2O4 was obtained at pH 4.5, while for the gambir reducing agent at pH 5. Furthermore, the optimal concentration for the NH2OH.HCl reducing agent was obtained at a concentration of 6 ppm, for the H2C2O4 reducing agent at a concentration of 4 ppm, and for the gambir reducing agent at a concentration of 8 ppm. The optimal activity time for NH2OH.HCl reduction was obtained at 30 minutes, H2C2O4 at 225 minutes, and gambir at 90 minutes. The calibration curve measurements for NH2OH.HCl, H2C2O4, and gambir reducers had determination coefficients (R²) of 0,9984; 0,9961; 0,9984, respectively, with recovery rates of 86,238%; 89,387%; 85.048%.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Asam Oksalat (H2C2O4), Fe(II)-Fenantrolin, Gambir (Uncaria gambir), Hidroksilamin Hidroklorida (NH2OH.HCl), Spektrofotometri UV-Vis, Oxalic Acid (H2C2O4), Fe(II)-Phenanthroline, Gambir (Uncaria gambir), Hydroxylamine Hydrochloride (NH2OH.HCl), UV-Vis Spectrophotometri |
| Subjects: | Q Science > QD Chemistry > QD75.2 Chemistry, Analytic |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis |
| Depositing User: | Salwa Amalia Putri Rimansa |
| Date Deposited: | 05 Aug 2025 00:54 |
| Last Modified: | 05 Aug 2025 00:54 |
| URI: | http://repository.its.ac.id/id/eprint/126826 |
Actions (login required)
 |
View Item |