Purge Trap for GC Analyses of Volatile Aromatic (BTEX) Compounds in Soils and Sediments

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Courtesy of Sigma-Aldrich Co., LLC

The BTEXTRAP purge trap was designed specifically for monitoring benzene, toluene, ethylbenzene, and the xylene isomers (BTEX compounds).  The trap allows large amounts of methanol (used in the US EPA Method 5030 procedure for preparing soil and sediment samples) to pass through the adsorbent beds while retaining the analytes of interest.  In evaluations of trap performance, relative analyte recovery was consistent for samples containing a low level and a high level of added methanol.

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