用蒸馏水或乙醇水溶液抽提试样中的水溶性酸或碱，然后用酸度计或指示剂对抽提物进行测定。
It USES distilled water and alcohol to refine water soluble acid and alkali of sample and then test the extractive with PH indicator.
对催化裂化柴油进行碱-醇抽提，抽提出催化柴油中的酚类化合物。
Phenol compounds were obtained from FCC diesel fuels by alkali-alcohol extraction.
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