求翻译：是由于溶剂系统 pH变化改变了它们的存在状态（游离型或解离型），从而改变了它们在溶剂系统中的分配系数。pH梯度萃取法适合于酸性强弱不同的游离的黄酮类化合物的分离，是什么意思？

Solvent system ph change to change their presence status (free, or dissociation type), thus changing the distribution coefficient in the solvent system. ph gradient extraction method suitable for the separation of the acidic strength of the free flavonoids,

It is the solvent system pH changes have changed their presence (or the free-from-type) in order to change the solvent system of distribution factor. Any pH gradient strength suitable for acid free radicals in the different flavonoid compounds, the separation

Is because the solvent system pH change changed their existence condition (dissociation or dissociation), thus changed them in the solvent system distribution coefficient.The pH gradient extraction method suits in the acidic strong and the weak different dissociation flavonoid separation,

Is due to the pH of the solvent system has changed their status (free or dissociation), so as to change their distribution coefficient of solvent system. PH gradient extraction suitable for acid strength of isolation of flavonoids of different free,

正在翻译，请等待...