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  • Measurement of Chlorinated Hydrocarbons with an 11.7 PID (.pdf)
    The first commercial photoionization detector (PID) was introduced in 1974 (1,2) by HNU Systems. This PID used a sealed short wavelength (121 nm/10.2 eV) UV lamp. In 1979, we introduced an 11.7 lamp in response to the need for detecting chloroalkanes for the chemical industry (VCM production
  • Detection of ppt Levels of Aromatic Hydrocarbons in the Atmosphere (.pdf)
    A new method has been described and evaluated which will detect ppt levels of hydrocarbons in the atmosphere. An automatic GC was used with a concentrator and a photoionization detector to measure benezene, toluene and xylene (BTX). The values obtained in the Boston, MA area were in good agreement
  • Determination of Oxygenates and BTX in Beverage Grade CO2 (.pdf)
    . The photoionization detector (PID) has been improved to provide the sensitivity and. ppb detection limits required by the industry. The 301-B now has multiple valve switching. capability and multiple autozeros to smooth the baseline when columns are switched in or out. With these changes and system optimizations, we
  • Making the Difficult Look Easy: PAT at Talecris
    the albumin paste drying process, the PAT Core Team approved the use of a hand-held photoionization detector for the real-time monitoring of the acetone content,
  • GC Detection and Identification by Coupling PID and FID (.pdf)
    A technique has been developed that is based on analyzing the effluent from a gas chromatograph with both photoionization (PID) and flame ionization (FID) detectors. The relative molar response per mole of carbon (RMR) of the FID is similiar for many types of carbon atoms e.g. for aromatic
  • Finding the needle in a haystack
    X-rays, tomography, spectrometry, and photoionization are being used to detect explosives and weapons. An X-ray machine for detecting weapons and explosives provides this see-through image of a tanker truck. X-ray machines such as those from L-3 Communications, let screeners see and highlight

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