PEMANFAATAN EKSTRAK BUNGA PUKUL EMPAT SEBAGAI INDIKATOR ASAM BASA ALTERNATIF DENGAN VARIASI JENIS PELARUT DAN LAMA PENYIMPANAN

Nandasari, Anggit Dwi and , Dra. Aminah Asngad , M.Si (2017) PEMANFAATAN EKSTRAK BUNGA PUKUL EMPAT SEBAGAI INDIKATOR ASAM BASA ALTERNATIF DENGAN VARIASI JENIS PELARUT DAN LAMA PENYIMPANAN. Skripsi thesis, Universitas Muhammadiyah Surakarta.

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Abstract

The pukul empat flowers have a beautiful color that contains the natural pigments of the anthocyanin. Purple pigment derived from anthocyanin can be used as an alternative acid-base indicator. The purpose of this research is to know the influence of solvent type and the length of storage of interest extract at four as an alternative base acid indicator. The method used in this study was experimental using a complete randomized design (RAL) with two treatment factors namely the type of solvent and the storage time of the four-flower extract solution. The extraction of interest at pukul empat was done by maceration method using aquades solvent and 70% alcohol. The dye stability test of flower extract at pukul empat was done by 2 days, 4 days and 6 days old storage. The parameters of this study include the color change of filter paper soaked in the four-flower extract solution which has been stored and immersed in acid and base solutions. The results showed that variation of solvent type and storage duration affected the gradation of paper color when immersed in acid and base solution. This type of solvent aquades on a strong acid solution of apricod colored paper and on a strong base solution of colored paper keket. While the alcohol solvent is orchid colored paper on strong acid solution and green tea in strong base solution. The dye solution stability of the four ounce flower extract was stable at storage for 2 days, it was characterized by the color change of the solution to orange in the alcohol and red solvent in the aquades solvent. Keywords : anthocyanin, pukul empat flower, storage duration, acid-base indicator

Item Type:	Karya ilmiah (Skripsi)
Uncontrolled Keywords:	anthocyanin, pukul empat flower, storage duration, acid-base indicator
Subjects:	H Social Sciences > H Social Sciences (General)
Divisions:	Fakultas Keguruan dan Ilmu Pendidikan > Pendidikan Biologi
Depositing User:	Unnamed user with username a420130182
Date Deposited:	11 Aug 2017 07:54
Last Modified:	11 Aug 2017 07:54
URI:	http://eprints.ums.ac.id/id/eprint/55202

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