Wijaya, Elisabeth Astrid and Marpaung, Abdullah Muzi and Santoso, Filiana (2019) Stability Improvement of Anthocyanins from Butterfly Pea (Clitoria Ternatea L.) Flower Extract With Addition of Surfactant. Bachelor thesis, Swiss German University.

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Abstract

The effects of anionic, cationic and non-ionic surfactants on the stability of anthocyanin from Clitoria ternatea flower anthocyanin extract (CTAE) at pH 7 were studied using UV spectrophotometer analysis. The interaction of CTAE with anionic surfactants, sodium dodecyl sulfate (SDS) and sodium dodecylbenzene sulfonate (SDBS) and a cationic surfactant, dodecyltrimethylammonium bromide (DTAB) were able to prolong the stability of CTAE. SDS and SDBS seemed to preferentially stabilize the red cationic form AH+ while DTAB towards the blue anionic A- . Strong electrostatic attraction appeared to be necessary to attain the highest stability. On the other hand, cetyltrimethylammonium bromide (CTAB), also a cationic surfactant, demonstrated a contradictory effect which might be caused by electrostatic repulsion due to its higher hydrophobicity. Stability of CTAE was found to not change in the presence of nonionic surfactants. Stability improvement of CTAE in SDS led to further examination of its effects in various concentration (0.25%, 0.5% and 1%) and at pH 4 to 7. Positive effect was observed at pH 6 to 7 upon increasing concentration as evidenced in a shorter hypsochromic shift and delayed color loss of CTAE, substantially at 1% SDS. Yet, SDS appeared to be ineffective at pH 4 to 5 at all concentrations. Collectively, stabilization of CTAE was dependent to the whole chemical structure of surfactant, not only to the charge of the head groups.

Item Type:	Thesis (Bachelor)
Uncontrolled Keywords:	Butterfly Pea ; Clitoria Ternatea ; Anthocyanin ; Surfactant ; Stability
Subjects:	T Technology > TP Chemical technology > TP368 Food processing and manufacture
Divisions:	Faculty of Life Sciences and Technology > Department of Food Technology
Depositing User:	Adityatama Ratangga
Date Deposited:	18 May 2020 04:50
Last Modified:	18 May 2020 04:50
URI:	http://repository.sgu.ac.id/id/eprint/359

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