chromatograph

[kruh-mat-uh-graf, -grahf, kroh-muh-tuh-] Chemistry.
verb (used with object)
1.
to separate mixtures by chromatography.
noun
2.
a piece of equipment used to produce a chromatogram.

Origin:
1855–60; chromato- + -graph

rechromatograph, verb (used with object)
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
They should run samples of the vapor through a gas chromatograph during the
  drying process instead.
Over the next few days, they return with a solar-powered gas chromatograph to
  detect molecules emitted by the damaged leaves.
That's not to say that they allowed any ooze in their lab, let alone in their
  gas chromatograph.
The chemical that produces this taste was present in such low concentrations
  that it could not be found by a gas chromatograph.
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