STUDY ON EXTRACTION AND CHARACTERIZATION OF RED PIGMENT FROM BOMBAX MALABARICUM
Hui Wang
Abstract
Hui Wang
Abstract
Physico chemical properties and extraction conditions of the red pigment in flowers of Bombax malabaricum were investigated. Results showed that good yield of pigment could be obtained by acid extraction, such as 0.1 mol/L HCl 50% C 2 H 5 OH(1∶1)at 60 ℃ for 2 h.The B. malabaricum red pigment is classified to anthocyanins, for which pH had significant effect on the tone of pigment. The pigment is stable to heat under acid condition. Under sunlight, degradation of the pigment could be accelerated, but regardless of ultraviolet light. Metallic ions Na + ,Mg 2+ ,Ca 2+ ,Al 3+ ,Cu 2+ ,Pb 2+ and Zn 2+ had no effect on the tone of pigment, but Fe 3+ and Sn 2+ had severe disadvantageous effect. This kind of pigment possesses poor anti oxidation ability. Addition of glucose, sucrose had no effect on the pigment.
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Physico chemical properties and extraction conditions of the red pigment in flowers of Bombax malabaricum were investigated. Results showed that good yield of pigment could be obtained by acid extraction, such as 0.1 mol/L HCl 50% C 2 H 5 OH(1∶1)at 60 ℃ for 2 h.The B. malabaricum red pigment is classified to anthocyanins, for which pH had significant effect on the tone of pigment. The pigment is stable to heat under acid condition. Under sunlight, degradation of the pigment could be accelerated, but regardless of ultraviolet light. Metallic ions Na + ,Mg 2+ ,Ca 2+ ,Al 3+ ,Cu 2+ ,Pb 2+ and Zn 2+ had no effect on the tone of pigment, but Fe 3+ and Sn 2+ had severe disadvantageous effect. This kind of pigment possesses poor anti oxidation ability. Addition of glucose, sucrose had no effect on the pigment.
Key concepts: Pigment, Chemistry, Extraction (chemistry), Nuclear chemistry, Yield (engineering), Botany, Chromatography, Organic chemistry