求翻译：由于姜黄素具有酚羟基结构，而酚羟基能溶于碱性溶液中，利用这一原理，姜黄素溶于碱性溶液，然后用稀盐酸调节pH值，直至姜黄素析出，便得到了姜黄素的产品，这种提取方法就是酸碱提取法。是什么意思？

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Because of Curcumin with BPA-Free hydroxy structure, and BPA-Free hydroxy can be soluble in alkaline solution, and to use the theory, Curcumin soluble in alkaline solution, and then with dilute hydrochloric acid adjustment pH value until Curcumin extract, has been of Curcumin product, this extractio

Because the ginger flavine has the phenol hydroxyl structure, but the phenol hydroxyl can dissolve in the alkazid solution, uses this principle, the ginger flavine dissolves in the alkazid solution, then adjusts the pH value with the diluted hydrochloric acid, until the ginger flavine separation, th

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