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CDS Analytical Purge & Trap

  • Description

Purge & Trap

Extracting & concentrating VOC’s

Purge-and-trap is the ideal method for extracting and concentrating volatile organic compounds (VOCs) from liquids & solids for analysis by GC or GC/MS. This procedure is particularly useful for concentrating VOCs that are insoluble or poorly soluble in water and have boiling points less than 200°C. The process is flexible and convenient and based on EPA methods 524, 624, 8260 and 5035.

Key features:

The purge-and-trap procedure involves purging a sample with an inert gas, such as nitrogen or helium at ambient temperature (water) or slightly elevated temperatures (soil). This liberates the VOCs, which are efficiently transferred from the aqueous (or solid) phase to the vapor phase. During this purge step, the inert gas is swept to an analytical trap containing a solid sorbent which retain the VOCs. The trap is then desorbed and the VOCs are transferred to the GC for analysis.

Contact us
  • DKSH Australia Pty Ltd
  • 14-17 Dansu Court
  • Hallam VIC 3803
  • Australia

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