| 摘要 |
The present invention provides a high-purity acid-form sophorolipid (SL)-containing composition characterized by substantially not containing acetic acid. The high-purity acid-form SL-containing composition can be produced, for example, by the following method:
(i) adjusting the pH of a partially purified acid-form SL-containing composition to an acidic range; and
(ii-a) subjecting an acidified partially purified acid-form SL-containing composition obtained in step (i) to chromatography to acquire a fraction containing an acid-form SL, or
(ii-b) leaving the acidified partially purified acid-form SL-containing composition obtained in step (i) to stand under a low-temperature condition to acquire a resulting gelled object. |
