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The goal of this study was to extract β-carotene from CYY95-26 sweet potatoes. Acetone was used as the solvent to successfully extract β-carotene. To achieve better extraction results, acetone concentration was required to be higher than 75%. Two extraction parameters, including acetone concentration and extraction time, were evaluated with the response surface methodology. The process was optimized, and optimal extraction conditions were determined to be 91.1% of acetone and 19.6 min extraction. Acetone concentration was a significant factor of the β-carotene extraction. The multiple extraction improved the extraction performance. After the third extraction, 278.1 mg/kg of β-carotene was extracted. The major carotene of CYY95-26 sweet potatoes was all-trans-β-carotene. CYY95-26 also contained small amount of 9-cis-β-carotene and 13-cis-β-carotene which were carotene isomers.

Studies of Carotene Extraction from Sweet Potato Variety CYY95-26, Ipomoea batatas, L