Pemanfaatan Kulit Ubi Ungu sebagai Indikator Asam-basa Alternatif Alami dengan Variasi Suhu dan Jenis Pelarut

Mahanani, Sulistyo and , Dra. Aminah Asngad, M. Si (2017) Pemanfaatan Kulit Ubi Ungu sebagai Indikator Asam-basa Alternatif Alami dengan Variasi Suhu dan Jenis Pelarut. Skripsi thesis, Universitas Muhammadiyah Surakarta.

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Abstract

The pH indicator existence is very important to support the mastery of certain material concepts that require practicum, especially on the material of Substances Classification in Science Learning of High School. Some species of plant can be used as alternative acid-base indicators because they contain anthocyanins. Purple sweet potato peel contains pigment which is flavonoid compound called anthocyanin. This research aims to know the effect of the drying temperature of the material and the type of solvent to the color changes produced on the acid-base indicator paper of the purple sweet potato peel extract after being tested. This research used experimental method with Completely Randomized Design (CRD) using two treatment factors they are drying temperature variation (50oC, 70oC, 90oC) and solvent type (methanol and methanol+ HCI 1%). The parameter in this research is the color change of acid-base indicator paper from purple sweet potato peel extract after dipped into acid and base solvent. Based on the research result can be concluded that the best quality is shown by the acid-base indicator paper with 70oC drying temperature and methanol solvent, because it is able to show more contrasting color degradation (bright pink color in strong acid, green tea in strong base, shocking pink on weak acid, and mauves on a weak base).

Item Type: Thesis (Skripsi)
Uncontrolled Keywords: antosianin, indikator asam-basa, kulit ubi ungu, suhu pengeringan, jenis pelarut
Subjects: Q Science > QD Chemistry
Divisions: Fakultas Keguruan dan Ilmu Pendidikan > Pendidikan Biologi
Depositing User: SULISTYO MAHARANI
Date Deposited: 16 Aug 2017 03:04
Last Modified: 16 Aug 2017 03:04
URI: http://eprints.ums.ac.id/id/eprint/55629

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