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Caffeine was being extracted using a biphasic mixture of 1 M HCl and ethyl acetate. After extracting the aqueous phase three times with ethyl acetate, a limited amount of caffeine was recovered. The aqueous phase was then brought to a pH of around 9 via the addition of a saturated sodium bicarbonate solution. After three additional ethyl acetate extractions (and concentration of this second ethyl acetate layer), a significant amount of caffeine was recovered. Why was extraction of the acidic aqu

Caffeine was being extracted using a biphasic mixture of 1 M HCl and …

2023年4月25日

Ethyl Acetate Solvent

Ethyl Acetate Solvent

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Ethyl Acetate

Ethyl Acetate

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Crude Ethyl Acetate

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