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Saponification is the process of hydrolyzing fats or oils with a strong base, like sodium hydroxide (NaOH), to produce soap and glycerol. It's not the best way to isolate free fatty acids from crude palm oil because the process involves converting the fatty acids into their sodium salts (soap). To isolate free fatty acids, you would need a different approach like acid-catalyzed hydrolysis or enzymatic hydrolysis.