Extraction of Anthocyanin Pigments from Purple Sunflower Hulls |
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| Authors: | L. GAO G. MAZZA |
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| Affiliation: | Authors Gao and Mazza are affiliated with Food Research Program, Agriculture and Agri-Food Canada, Research Centre, Summerland, British Columbia, Canada VOH 1Z0. Address inquiries to Dr. G. Mazza. |
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| Abstract: | The anthocyanin pigments in hulls of purple sunflower seeds were extracted using three solvent systems, 50:1:49 ethanol-acetic acid-water (EAW), 0.01M acetic acid (AAc), or water containing SO2. Solvent, extraction time, size of ground hulls, pH of extracting solvent, hulls/solvent ratio, and concentration of SO2 in water, were investigated. All were significant factors affecting yield of extracted anthocyanins. EAW and SO2 were more effective extractants than AAc. Optimum conditions from response surface optimization for the extraction with sulphurous water were: SO2 at 200 mg/L, hull size 20 mesh, extraction time 5 min at 22°C, and solvent/hulls ratio = 20. |
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| Keywords: | plant pigments anthocyanins colorants extraction Helianthus annus |
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