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  • Wired 8.08: A Helium Shortage?
    - and therefore helium-3 - before the fusion technology is even developed. Nearly all of the world's helium supply is found within a 250-mile radius of Amarillo, Texas (the Helium Capital of the World). A byproduct of billions of years of decay, helium is distilled from natural gas that has accumulated
  • How to Convert from Helium to Hydrogen as a Carrier Gas in Gas Chromatography (.pdf)
    This How to Guide will take you though the steps necessary to convert from Helium to Hydrogen as a carrier gas for Gas Chromatography. The use of Hydrogen from an inhouse >generator will lead to considerable benefits in cost, safety and convenience in the laboratory
  • Reducing Time Jitter in Time-of-Flight Detectors (.pdf)
    The effects of time jitter on time-of-flight mass spectrometer detectors is examined. Improvements to both microchannel flatness and ion arrival time. Improving TOF Mass Resolution by Reducing Ion Detector Time Jitter - - Chromatography Online. Stay Connected. * Browse Archives. * Application Notes
  • Selecting Makeup Gas for GC with FID (.pdf)
    such as helium. larger than. gas flow rate is in the order of a few mL/min. or nitrogen is delivered to the chromatographic. In contrast, the optimum flow rate for detec-. system between the column and the detector. The. the flow rate. tion of the compounds of interest is typically. makeup gas should
  • Mass Spectroscopy of Metastable Atomic Species in Gas Analysis and Processing Plasmas at High Spectrometer Source Pressures
    data from neutral gases and plasmas in a range of gas mixtures which include helium, krypton or argon are shown. The majority of the. data presented consist of electron impact threshold ionization efficiency curves obtained by scanning the energy of the electrons in the QMS source. The results
  • Mass Spectroscopy of Metastable Atomic Species in Gas Analysis and Processing Plasmas at High Spectrometer Source Pressures - AVS 2011
    , in particular, from the plasma is improved. The sampling of ion and neutral species from magnetron plasmas is a good example. The. reactor. Typical data from neutral gases and plasmas in a range of gas mixtures which include helium, krypton or argon are shown. The majority of the. particle counter used
  • Medical Device Link .
    After determining how to draw the gas samples, sterilization engineers must also decide on a gas analysis method. The two most common ways to analyze in-chamber gases are chromatography and spectroscopy. Gas chromatography (GC) is already well known in the EtO industry for its applications
  • Medical Device Link .
    (pressure chamber) and pressurized with helium. * The device is then placed in the CHLD test chamber. * A cryopump begins to evacuate the chamber, but does so not by exhausting gas but by freezing the nitrogen, oxygen, and most other atomic species. * As the other gases freeze, only helium (if any

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