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Extraction and characterization of pigments from Smilax discotis Warb. fruits

LI Xiang-xing

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Abstract

The pigments in Smilax discotis fruits were extracted by solvent extraction method and analyzed for their physico-chemical properties.The best extraction conditions were found as follows: 40% ethanol(V/V) as extraction solvent for 1h extraction at 60℃.The pigments were stable to light and strongly acidic environments and had a different color in neutral and slightly alkaline environments.Their tolerance to NaSO3,sodium benzoate and KMnO4was poor,EDTA and citric acid had no significant impact on them.Vc had hyperchromic effect on them and 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

The pigments in Smilax discotis fruits were extracted by solvent extraction method and analyzed for their physico-chemical properties.The best extraction conditions were found as follows: 40% ethanol(V/V) as extraction solvent for 1h extraction at 60℃.The pigments were stable to light and strongly acidic environments and had a different color in neutral and slightly alkaline environments.Their tolerance to NaSO3,sodium benzoate and KMnO4was poor,EDTA and citric acid had no significant impact on them.Vc had hyperchromic effect on them and 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

The pigments in Smilax discotis fruits were extracted by solvent extraction method and analyzed for their physico-chemical properties.The best extraction conditions were found as follows: 40% ethanol(V/V) as extraction solvent for 1h extraction at 60℃.The pigments were stable to light and strongly acidic environments and had a different color in neutral and slightly alkaline environments.Their tolerance to NaSO3,sodium benzoate and KMnO4was poor,EDTA and citric acid had no significant impact on them.Vc had hyperchromic effect on them and 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, Extraction (chemistry), Citric acid, Chemistry, Sodium benzoate, SN2 reaction, Hyperchromicity, Solvent

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Extraction and characterization of pigments from Smilax discotis Warb. fruits — Research Paper | ScholarLens