VICI Pulsed Discharge Detectors


The pulsed discharge detector (PDD) utilizes a stable, low-powered, pulsed DC discharge in helium as the ionization source. Performance is equal to or better than GC detectors with conventional radioactive sources.

Pulsed Discharge Detectors

In the helium photoionization mode, the PDD is a universal, non-destructive, high sensitivity detector. In the electron capture mode, the PDD is a selective detector for monitoring high electron affinity compounds such as freons, chlorinated pesticides, and other halogen compounds.

VICI PDDs (pulsed discharge detectors) utilize a stable, low powered, pulsed DC discharge in helium as an ionization source. Eluants from the column, flowing counter to the flow of helium from the discharge zone, are ionized by photons from the helium discharge. The bias electrode(s) focus the resulting electrons toward the collector electrode, where they cause changes in the standing current which are quantified as the detector output. Performance is equal to or better than detectors with conventional radioactive sources.

  • Benefits

    • Non-radioactive, non-destructive, highly sensitive, and universal
    • Linear response over a wide range
    • Minimum detectable quantities for most compounds in the low ppb range
  • Configuration

    The D-2 is a dual mode, universal detector system which can be retro-fitted to your older GC. The D-2-I is optimized for trace level work in the helium photoionization mode.

    The stand-alone systems include detector, controller, electrometer, helium purifier, and power supply.

    Available for 110 VAC and 220 VAC.

     

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