How are 2 pentanone and pxylene related in preparative gas chromatography Organic Chemistry lab?

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How are 2 pentanone and p-xylene related in preparative gas chromatography Organic Chemistry lab?

METHOD 8260B
VOLATILE ORGANIC COMPOUNDS BY GAS CHROMATOGRAPHY/
MASS SPECTROMETRY (GC/MS)
1.0 SCOPE AND APPLICATION 1.1 Method 8260 is used to determine volatile organic compounds in a variety of…
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