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Comprehensive Two-Dimensional Gas Chromatography coupled ...

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Pre-Concentrator<br />

GACID<br />

Column one<br />

Stainless Steel Mesh<br />

Beds<br />

Y B X C<br />

Nut<br />

Glass Wool<br />

<strong>Gas</strong> Flow During Sample Collection<br />

<strong>Gas</strong> Flow During Sample Desorption<br />

Carbon Molecular Sieve<br />

Graphitized Carbon<br />

Symbo<br />

l<br />

Adsorbent<br />

Carboxen<br />

1000<br />

Carbopack X<br />

Adsorbent<br />

Strength<br />

Application<br />

C Strongest C 2 to C 5<br />

X<br />

B<br />

Y<br />

Carbopack B<br />

Carbopack Y<br />

Stronger<br />

Weaker<br />

Weakest<br />

C 3 to C 5<br />

C 5 to C 12<br />

C 12 to C 20<br />

09/23/2005 S. Scherer 23

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