| 摘要 |
Grape pomace is contacted with an aqueous extraction solvent containing HSO3- ions to form anthocyanin-(HSO3) complex. The complex is recovered by treating the liquid extract phase with a non-ionic adsorbent to adsorb the complex. Anthocyanin colorant, free of the HSO3- ions is recovered by elution with an acidified organic solvent for anthocyanin. The anthocyanin colorant may be provided in dry form by drying the solvent solution. This process allows us to remove sugars, organic acids, polymerized anthocyanin pigment and other water soluble material, thus providing a highly "colored" monomeric anthocyanin pigment. The anthocyanin colorant produced by this process is at least 10 times more concentrated than that produced by conventional methods and about two times stronger than most of the concentrated pigment.
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