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Dynamic Headspace DHS
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Automated Dynamic Headspace DHS is available for the GERSTEL MultiPurpose Sampler MPS. The DHS station efficiently extracts and concentrates VOCs from liquid or solid samples placed in standard Headspace vials
 
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Automated Dynamic Headspace DHS

Automated Dynamic Headspace  DHS is available for the GERSTEL MultiPurpose Sampler MPS.
The DHS station efficiently extracts and concentrates VOCs from liquid
or solid samples placed in standard Headspace vials. The sample is
thermostated and agitated while the headspace is purged with a
controlled flow of inert gas, providing controlled and efficient
extraction conditions. Sample temperatures can be selected from 10 °C
to 200 °C. Lowering the temperature provides a means of reducing the
amount of water vapor released and ultimately retrapped. The DHS
station additionally holds a replaceable adsorbent- or sorbent filled
tube used for analyte concentration. The temperature of the adsorbent
tube during the DHS process can be varied from 20 °C to 70 °C for
optimal trapping of the analytes in question.

Adsorbent tubes used are standard GERSTEL Thermal Desorption Unit TDU
tubes. Following analyte concentration, the tube is automatically
transferred to the TDU for Thermal Desorption and analyte transfer to
the GC. Tubes are fitted with individual adapters enabling both
automated movement and leak-free sealing during the Dynamic
Headspace and Thermal Desorption steps and during storage in the
autosampler tray.
Automated Dynamic Headspace DHS combined with sample introduction to
a GC or GC/MS system is performed by the MPS and TDU. Up to 98 samples
can be processed automatically in one sequence.
Dynamic Headspace benefits:
  • The GERSTEL Dynamic Headspace provides lower detection limits than static headspace, SPME and other widely used techniques
  • High productivity through high throughput design and complete automation from sample preparation to GC/MS-analysis
  • Highest flexiblity: User defined extraction time, flow, temperature and adsorbent
  • The Dynamic Headspace technology provides multiple water management options to ensure best chromatography and MS stability
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