ScholarLens Back to search
2007•Food ScienceRequires access

Extraction and Stability Study on Red Speckled Kidney Bean Pigment

Cheng Ying-kun

Open publisher page 0 citations

Abstract

The optimal extractive process and stability of the pigment extracted from red speckled kidney bean (Phaseolus vulgaris L.) were studied. Results showed that the optimum extraction yield can be obtained by 75% acidic ethanol heated up at 60 ℃ for 90 minutes with a material-solvent ratio of 1:75(g/ml). The pigment holds good resistance to light and heat. Also, the pigment is stable in acidic conditions, but sediment emerges when pH is equal to or above 4. It is also resistant to carbohydrates. Potassium sorbate, sodium benzoate and citric acid have no adverse effects on the pigment but vitamin C and H2O2 do. The pigment is relatively stable with Vitamin C of lower concentration. Metallic ions Na+, K+ and Ca2+ have no effect on the pigment, but Fe3+, Cu2+, Fe2+, Zn2+ and Mg2+ have apparent effects on it.

About this research paper

What this paper is about

The optimal extractive process and stability of the pigment extracted from red speckled kidney bean (Phaseolus vulgaris L.) were studied. Results showed that the optimum extraction yield can be obtained by 75% acidic ethanol heated up at 60 ℃ for 90 minutes with a material-solvent ratio of 1:75(g/ml). The pigment holds good resistance to light and heat. Also, the pigment is stable in acidic conditions, but sediment emerges when pH is equal to or above 4. It is also resistant to carbohydrates. Potassium sorbate, sodium benzoate and citric acid have no adverse effects on the pigment but vitamin C and H2O2 do. The pigment is relatively stable with Vitamin C of lower concentration. Metallic ions Na+, K+ and Ca2+ have no effect on the pigment, but Fe3+, Cu2+, Fe2+, Zn2+ and Mg2+ have apparent effects on it.

Why it matters

A significance statement is not available in the OpenAlex record.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

The optimal extractive process and stability of the pigment extracted from red speckled kidney bean (Phaseolus vulgaris L.) were studied. Results showed that the optimum extraction yield can be obtained by 75% acidic ethanol heated up at 60 ℃ for 90 minutes with a material-solvent ratio of 1:75(g/ml). The pigment holds good resistance to light and heat. Also, the pigment is stable in acidic conditions, but sediment emerges when pH is equal to or above 4. It is also resistant to carbohydrates. Potassium sorbate, sodium benzoate and citric acid have no adverse effects on the pigment but vitamin C and H2O2 do. The pigment is relatively stable with Vitamin C of lower concentration. Metallic ions Na+, K+ and Ca2+ have no effect on the pigment, but Fe3+, Cu2+, Fe2+, Zn2+ and Mg2+ have apparent effects on it.

Key concepts: Pigment, Phaseolus, Sodium benzoate, Citric acid, Extraction (chemistry), Potassium sorbate, Chemistry, Yield (engineering)

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
Extraction and Stability Study on Red Speckled Kidney Bean Pigment — Research Paper | ScholarLens