This may be attributable to the content of more nonphenol compounds
such as carbohydrate and terpene in water extracts
than in other extracts. It may also be caused by the possible
complex formation of some phenolic compounds in the
extract that are soluble in methanol, acetone, and ethanol.
These phenolic compounds may possess more phenol groups
or have higher molecular weights than the phenolics in the
water extract. Based on the results of TPC, the best extracting
solvent was ethanol.