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Effect of pH on Natural Pigment Betacyanin Extraction from Bougainvillea Bracts

Nur Athirah, Sabarudin and Mimi Sakinah, A. M. and Zularisam, A. W. (2016) Effect of pH on Natural Pigment Betacyanin Extraction from Bougainvillea Bracts. In: Proceedings of The National Conference for Postgraduate Research (NCON-PGR 2016), 24-25 September 2016 , Universiti Malaysia Pahang (UMP), Pekan, Pahang. pp. 599-563..

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Abstract—Natural dyes derived from plant sources were used in textile industries. However, there are limitation involved with natural dye including laborious extraction of colour component of the raw material, low colour value and long dyeing time promote the cost of dyeing with natural dyes considerably higher compare to synthetic dyes. Besides, the parameter of the extraction process like medium pH is still ambiguous. Solid-liquid extraction that allows the removal of soluble component from solids using solvent has been applied as the method used in this research. In this work, Bougainvillea was chosen as a source of plant base, red natural dye which rich in betalain pigments The present study reports on the extraction of natural dye pigment where one-factor- at a time has been studied that is the pH, range from 1.0 to 10.0 using solid-liquid extraction process. The color strength of dye was then analyzed using UV- Vis Spectrophotometer. The results showed that the best extraction condition was obtained with pH 4.0. In these conditions, it shows the highest absorbance reading was 2.92 and the dye concentration was 10.67 g/L. It is suggested that solid-liquid extraction with water as the solvent at acidic medium was an efficient process to extract the betacyanin.

Item Type: Conference or Workshop Item (Lecture)
Uncontrolled Keywords: Betacyanin; extraction; pH
Subjects: T Technology > TP Chemical technology
Faculty/Division: Faculty of Chemical & Natural Resources Engineering
Faculty of Engineering Technology
Depositing User: Noorul Farina Arifin
Date Deposited: 18 Oct 2016 04:15
Last Modified: 31 Oct 2017 03:07
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