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Analytical Chemistry

Measure Twice

What is a liquid-liquid extraction?

Extractions are techniques used to separate the components of a mixture based on their solubilities in different media. A liquid-liquid extraction specifically uses two immiscible liquids to separate the components of a mixture. Two liquids are placed in the same container and shaken vigorously to allow the dissolved components to equilibrate between the two liquid phases. One liquid can then be drained from the container, and the solvents can then be evaporated to recover the separated components of the mixture.

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An apparatus for liquid-liquid extractions.

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