Study on extraction and physico-chemical properties of pigment from Celosia Cristata L.

Physico-chemical properties and extractions of the pigment in leafages of Celosia cristata L.were investigated. Results showed that good yield of pigment could be obtained by 10% C_ 2H_ 5OH solution at 80℃ for 60min with the solid-liquid ratio 1 ∶50 g/mL. The Celosia cristata L. pigment is classified to flavone, for which pH had significant effect on the tone of pigment. The pigment is stable to low temperature. Under sunlight, degradation of the pigment could be accelerated, but regardless of ultraviolet light. Metallic ions Na +、Ca 2+、Zn 2+、A1 3+had no effect on the tone of pigment, but Cu 2+、Fe 3+、Pb 2+had severe disadvantageous effect. This kind of pigment possesses better anti-oxidation ability. Addition of common salt,sucrose,citric acid had no effect on the pigment.