chromatography

(krō″mă-tŏg′ră-fē)

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[chrom- + -graphy]
The separation of two or more chemical compounds in a liquid or gaseous mixture by their removal at different rates based on differential solubility and adsorption. This separation is often accomplished by letting the chemicals percolate through a column of a powdered adsorbent or by passing them across the surface of an adsorbent paper, among other techniques.
chromatographic (-mat″ŏ-graf′ik)
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, adj.

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