Which of the following is used for concentration of aqueous extracts of marine bioactive compounds?

Which of the following is used for concentration of aqueous extracts of marine bioactive compounds? Correct Answer Freeze-drying

For concentration the aqueous extracts of marine bioactive compounds, freeze drying is used instead of evaporation (as in case of non-polar compounds). This is because sea water has high heat of vaporization and prolonged evaporation can lead to destruction of the activity of compounds.
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