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2013•Jiangsu Condiment and Subsidiary FoodRequires access

Extraction and Characterization of Pigments from Acanthopanan Trifoliatus Fruits

HE Ke-qu

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Abstract

Taking the ethnic medicine acanthopanan trifoliatus as materials,their extractions of the red pigment and physicochemical properties were analyzed. The best extraction conditions were found as follows: 40% ethanol( V/V) as extraction solvent for 1 h extraction at 60 ℃. The pigments were stable in natural light,dark red under acidic conditions and brownish green in neutral and slightly alkaline environments. KMnO 4,Vc,citric acid, NaSO3,sodium benzoate and EDTA had a considerable effect on colour increasing of the pigment from acanthopanan trifoliatus fruits. Some metal ions such as Ca2+、Mn2+、Zn2+、K+、Na+、Fe2+、Mg2+、Cu2+、Co2+、Al3+、 Pb2+ had hypochromic effect. Moreover,Sn2+and Fe3+ affected the stability of the pigments.

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What this paper is about

Taking the ethnic medicine acanthopanan trifoliatus as materials,their extractions of the red pigment and physicochemical properties were analyzed. The best extraction conditions were found as follows: 40% ethanol( V/V) as extraction solvent for 1 h extraction at 60 ℃. The pigments were stable in natural light,dark red under acidic conditions and brownish green in neutral and slightly alkaline environments. KMnO 4,Vc,citric acid, NaSO3,sodium benzoate and EDTA had a considerable effect on colour increasing of the pigment from acanthopanan trifoliatus fruits. Some metal ions such as Ca2+、Mn2+、Zn2+、K+、Na+、Fe2+、Mg2+、Cu2+、Co2+、Al3+、 Pb2+ had hypochromic effect. Moreover,Sn2+and Fe3+ affected the stability of the pigments.

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Available abstract

Taking the ethnic medicine acanthopanan trifoliatus as materials,their extractions of the red pigment and physicochemical properties were analyzed. The best extraction conditions were found as follows: 40% ethanol( V/V) as extraction solvent for 1 h extraction at 60 ℃. The pigments were stable in natural light,dark red under acidic conditions and brownish green in neutral and slightly alkaline environments. KMnO 4,Vc,citric acid, NaSO3,sodium benzoate and EDTA had a considerable effect on colour increasing of the pigment from acanthopanan trifoliatus fruits. Some metal ions such as Ca2+、Mn2+、Zn2+、K+、Na+、Fe2+、Mg2+、Cu2+、Co2+、Al3+、 Pb2+ had hypochromic effect. Moreover,Sn2+and Fe3+ affected the stability of the pigments.

Key concepts: Pigment, Sodium benzoate, Extraction (chemistry), Citric acid, Chemistry, Metal ions in aqueous solution, SN2 reaction, Solvent

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