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2010•Guangdong nongye kexueOpen access

Study on extraction and stability of pigment from Pumpkin

Yankai Liu

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Abstract

The optimal extractive process and stability of the pigment extracted from pumpkin was studied.On the basis of single factor tests,the L9(34) orthogonal test was used in the optimization of technological parameters.Results showed that the optimum extraction yield can be obtained by 90% ethanol heated up at 70℃ for 6 h with the material-solvent ratio of 1∶20(g/mL).The pigment holds less resistance to light.The pH value in 2 ≤pH≤14 the pigment is stable.H2O2 make the clear degradation of pigment,Na2SO3 play a hyperchromic effect on the pigment.Common food additives affect not obviously to the stability of pigment.Except Na+,Ca2+,Mg2+,Cu2+,Fe2+,Al3+have remarkably effect on the pigment.

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What this paper is about

The optimal extractive process and stability of the pigment extracted from pumpkin was studied.On the basis of single factor tests,the L9(34) orthogonal test was used in the optimization of technological parameters.Results showed that the optimum extraction yield can be obtained by 90% ethanol heated up at 70℃ for 6 h with the material-solvent ratio of 1∶20(g/mL).The pigment holds less resistance to light.The pH value in 2 ≤pH≤14 the pigment is stable.H2O2 make the clear degradation of pigment,Na2SO3 play a hyperchromic effect on the pigment.Common food additives affect not obviously to the stability of pigment.Except Na+,Ca2+,Mg2+,Cu2+,Fe2+,Al3+have remarkably effect on the pigment.

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Available abstract

The optimal extractive process and stability of the pigment extracted from pumpkin was studied.On the basis of single factor tests,the L9(34) orthogonal test was used in the optimization of technological parameters.Results showed that the optimum extraction yield can be obtained by 90% ethanol heated up at 70℃ for 6 h with the material-solvent ratio of 1∶20(g/mL).The pigment holds less resistance to light.The pH value in 2 ≤pH≤14 the pigment is stable.H2O2 make the clear degradation of pigment,Na2SO3 play a hyperchromic effect on the pigment.Common food additives affect not obviously to the stability of pigment.Except Na+,Ca2+,Mg2+,Cu2+,Fe2+,Al3+have remarkably effect on the pigment.

Key concepts: Pigment, Extraction (chemistry), Yield (engineering), Chemistry, Solvent, Biological pigment, Degradation (telecommunications), Chromatography

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