Gas Chromatography (GC) (IUPAC Compendium of Chemical Terminology):
Lecture 3. Gas chromathography. BONDED AND CROSS-LINKED STATIONARY PHASES: Cross-linked stationary phases have the individual polymer chains linked via covalent bonds. Bonded stationary phases are covalently bonded to the surface of the tubing. Both techniques impart enhanced thermal and solvent stability to the stationary phase. Also, columns with bonded and cross-linked stationary phases can be solvent rinsed to remove contaminants. Most polysiloxanes and polyethylene glycol stationary phases are bonded and cross-linked. A few stationary phases are available in an nonbonded version; some stationary phases are not available in bonded and cross-linked versions. Use a bonded and cross-linked stationary phase if one is available. 16
Lecture 3. Gas chromathography. GAS – SOLID: PLOT Columns. Gas-solid stationary phases are comprised of a thin layer (usually
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Lecture 3. <strong>Gas</strong> chromathography.<br />
BONDED AND CROSS-LINKED STATIONARY PHASES:<br />
Cross-linked stationary phases have the individual polymer chains linked via<br />
covalent bonds.<br />
Bonded stationary phases are covalently bonded to the surface <strong>of</strong> the tubing.<br />
Both techniques impart enhanced thermal and solvent stability to the stationary<br />
phase. Also, columns with bonded and cross-linked stationary phases can be<br />
solvent rinsed to remove contaminants.<br />
Most polysiloxanes and polyethylene glycol stationary phases are bonded and<br />
cross-linked.<br />
A few stationary phases are available in an nonbonded version; some stationary<br />
phases are not available in bonded and cross-linked versions. Use a bonded and<br />
cross-linked stationary phase if one is available.<br />
16
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