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Operational Procedures in Purge and Trap

The operational conditions of the purge and trap must be compatible with the configuration of the GC system. A high carrier gas (desorb gas) flow rate can be used with a packed GC column. The trap desorption time is short at the high flow rate, producing a narrowband injection. The optimum flow is about 50 mL/min. Capillary columns are generally preferred over packed columns for better resolution, but these columns require lower flow rate. [Pg.199]

Megabore capillary columns (0.53 mm ID or larger) are typically used at a flow rate of 8 to 15 mL/min. Desorption is slower at such flow rates, and [Pg.199]

Solid-phase microextraction (SPME) is a relatively new method of sample introduction, developed by Pawliszyn and co-workers in 1989 [28,29] and [Pg.200]

The simplest way to begin developing an SPME method is to consult the applications guide provided by Supelco. This allows the analyst to quickly [Pg.201]

PDMS 7 GC/HPLC for nonpolar high-molecular-weight compounds [Pg.203]


See other pages where Operational Procedures in Purge and Trap is mentioned: [Pg.199]   


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In procedure

Operational procedure

Operations Procedures

Operations and procedures

Purgatives

Purge

Purge-and-trap

Purging operations

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