Faradillah, Chika (2017) MODIFIKASI PATI GANYONG (CANNA EDULIS KERR) DENGAN METODE HIDROLISIS ASAM DAN ASETILASI. Undergraduate thesis, UNIMED.
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Abstract
Telah dilakukan modifikasi pati dari umbi ganyong (Canna edulis Kerr) dengan metode hidrolisis asam dan asetilasi. Tujuan modifikasi adalah agar diperoleh pati dengan struktur dan sifat fisika kimia yang berbeda dengan pati sebelum modifikasi. Hidrolisis dilakukan menggunakan HCl 3% dengan variasi waktu 30, 90 dan 150 menit. Selanjutnya pati dari hasil hidrolisisnya diasetilasi menggunakan asetat anhidrat dengan variasi waktu 5, 60 dan 90 menit. Hasil penentuang derajat substitusi (DS) menunjukkan bahwa ada peningkatan DS dengan meningkatnya lama reaksi asetilasi. Selanjutnya dilakukan pengujian berat molekul dengan menggunakan viskometer ostwald. Didapatkan hasil 16481,62 gram/mol pada pati alami dan 1490,05 gram/mol pada pati asetat. Pati asetat yang terbentuk dilakukan analisis FTIR, pita serapan yang muncul pada daerah 3.000-3.500 cm-1 yang merupakan gugus –OH. Sedangkan gugus asetil C=O pada pita serapan 1.750 cm-1.
Item Type: | Thesis (Undergraduate) | ||||||
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Call Number: | SK-2018 KIM 002 | ||||||
Keywords: | pati ganyong; hidrolisis asam; asetilasi | ||||||
Subjects: | Q Science > QD Chemistry Q Science > QD Chemistry > QD146 Inorganic chemistry |
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Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam > Kimia | ||||||
Depositing User: | Mr Maknun | ||||||
Date Deposited: | 11 Jan 2018 09:04 | ||||||
URI: | http://digilib.unimed.ac.id/id/eprint/28114 |
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