Pangastuti, Devita Dwining (2017) Perbandingan Kondisi Optimum Pereduksi Natrium Tiosulfat (Na2S2O3) Dan Hidroksilamin Hidroklorida (NH2OH.HCl) Pada Analisa Kadar Total Besi Secara Spektrofotometri UV-Vis. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pada penelitian ini dibandingkan aktivitas pereduksi Na2S2O3 dan NH2OH.HCl yang meliputi pH optimum, waktu pembentukan kompleks dan konsentrasi optimum. Penentuan λ_maks diperoleh pada 512 nm. Selanjutnya optimasi pH buffer suasana asam diperoleh pH 4,5 untuk pereduksi Na2S2O3 dan pH 5,5 untuk NH2OH.HCl. Kedua pereduksi masing-masing dapat mereduksi optimum pada pendiaman 15 menit. Na2S2O3 ditemukan masih stabil di atas 15 menit, sedangkan NH2OH.HCl sudah rusak. Selain itu, dilakukan penentuan konsentrasi optimum pereduksi, dihasilkan 10 ppm pereduksi Na2S2O3 dan 11 ppm NH2OH.HCl untuk mereduksi 5 ppm larutan Fe3+.
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In this research, the activities of reductant Na2S2O3 and
NH2OH.HCl were compared include optimum pH, time of
complex formation and optimum concentration. Determination
was obtained at 512 nm. Optimization of pH buffer in
acidic conditions were obtained pH 4,5 and 5,5 for reductant
Na2S2O3 and NH2OH.HCl, respectively. Both reductants can
reduce optimally at 15 minutes. Na2S2O3 was found relatively
stable over 15 minutes, while NH2OH.HCl damaged. In addition,
the determination of optimum concentration of reductant were
produced 10 ppm Na2S2O3 and 11 ppm NH2OH.HCl to reduce 5
ppm solution of Fe3+.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Fe(II)-o-fenantrolin; Na2S2O3; NH2OH.HCl; Spektrofotometer UV-Vis; 1,10-fenantrolin |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Faculty of Mathematics and Science > Chemistry > 47201-(S1) Undergraduate Thesis |
| Depositing User: | - DEVITA DWINING PANGASTUTI |
| Date Deposited: | 04 May 2017 02:17 |
| Last Modified: | 08 Mar 2019 07:20 |
| URI: | http://repository.its.ac.id/id/eprint/3937 |
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