Paramaputri, Andara and Marpaung, Abdullah Muzi (2014) Kinetics of Anthocyanin Degradation During Extraction and Storage of Butterfly Pea Petal. Bachelor thesis, Swiss German University.

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Abstract

Kinetics of anthocyanin degradation of butterfly pea petals during extraction at 30, 45 and 60 °C as well as storage at 30, 40 and 50 °C were studied. The best method for cell wall destruction prior to extraction was chosen in terms of the highest monomeric and polymeric anthocyanin yield. The four treatments include freezing, mechanical using mortar and pestle, steam blanching and hot water blanching. The extraction was conducted for 240 and 360 minutes in dark, with a ratio of petal to solvent (HCl in aquadest pH 4.5) of 1:4 (w/v). The best treatment for cell wall destruction was the mechanical treatment. The storage was conducted for seven days in dark. Monomeric anthocyanin pigment increase showed zero order kinetics at 30 °C (k=0.04 mol L-1 min-1) and 45 °C (k=0.03 mol L-1 min-1), and stable at 60 °C. Polymeric colour degradation followed zero order kinetics at 30 °C (k=0.026 mol L-1 min-1) and 45 °C (k=0.027 mol L-1 min-1), and stable at 60 °C. During storage, the monomeric anthocyanin pigment followed first order kinetics, at 30 °C (k=0.05 day-1), 40 °C (k=0.07 day-1) and 50 °C (k=0.16 day-1) with activation energy of 44.6 kJ mol-1. While it was inconclusive that polymeric colour followed Arrhenius equation in regards to temperature.

Item Type:	Thesis (Bachelor)
Uncontrolled Keywords:	Anthocyanins, Butterfly Pea, Cell Wall Destruction, Extraction, Reaction Rate, Storage
Subjects:	Q Science > QK Botany > QK898 Anthocyanins R Medicine > RS Pharmacy and materia medica > RS160 Plant extracts T Technology > TP Chemical technology > TP156 Extraction (Chemistry) T Technology > TP Chemical technology > TP368 Food processing and manufacture
Divisions:	Faculty of Life Sciences and Technology > Department of Food Technology
Depositing User:	Faisal Ifzaldi
Date Deposited:	28 Jun 2021 16:39
Last Modified:	28 Jun 2021 16:39
URI:	http://repository.sgu.ac.id/id/eprint/2046

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