Pulsed Discharge Detector for Helium Ionization

VICI’s Pulsed Discharge Detector (PDD) for helium ionization extends the detection capabilities of the Agilent 6890 and new 7890 gas chromatography units. The basic operating mode of the PDD can replace virtually any of the detectors currently used by gas chromatography manufacturers. The Model D-3 is designed for plug-and-play installation on Agilent GCs, with models available for the 6890 and 7890. The D-3 is designed for trace level work in the helium photoionization mode and utilizes the electronics and power supply of the host GC. The system includes detector cell, pulser, and FID board, plus standard and mini-helium purifiers to provide the best possible sensitivity. It is suitable for use with columns from 50-micron capillaries to 1/8” packed. The PDD is non-radioactive, non-destructive, highly sensitive and universal. Response is linear over a wide range, and MDQs for most compounds are in the low PPB range. With no open flame, no hydrogen requirement and close-to-true-mass response, the PDD is a good upgrade for FIDs in petrochemical environments. When the helium discharge gas is doped with a suitable noble gas, the detector functions as a lampless, windowless photoionization detector.