• compounds
  • Both VUV spectrometers have the unique capability of providing spectral information that is both qualitative and quantitative for most gas phase compounds. (wikipedia.org)
  • The properties of the noble gases can be well explained by modern theories of atomic structure: their outer shell of valence electrons is considered to be "full", giving them little tendency to participate in chemical reactions, and it has been possible to prepare only a few hundred noble gas compounds. (wikipedia.org)
  • methane
  • With the different working principle, Electrochemical sensor for O2 and toxic gas, Catalytic combustion sensor for combustible gas, PID sensor for the VOC, Infrared sensor for the CO2 gas, also the Laser methane alarm. (environmental-expert.com)
  • Natural gas, in which methane is the principal constituent, is an abundant resource with a world reserve estimated at over 100.times.10.sup.12 m.sup.3. (patents.com)
  • Some common reagent gases include: methane, ammonia, and isobutane. (wikipedia.org)
  • stable
  • There are two stable isotopes of hydrogen, protium 1H and deuterium 2H, which vary in relative abundance on the order of hundreds of permil. (wikipedia.org)
  • The study of hydrogen stable isotopes began with the discovery of deuterium by chemist Harold Urey of the famous Urey and Miller experiment. (wikipedia.org)
  • noble
  • The inertness of noble gases makes them very suitable in applications where reactions are not wanted. (wikipedia.org)
  • Noble gases have several important applications in industries such as lighting, welding, and space exploration. (wikipedia.org)
  • Noble gas is translated from the German noun Edelgas, first used in 1898 by Hugo Erdmann to indicate their extremely low level of reactivity. (wikipedia.org)
  • Radon was first identified in 1898 by Friedrich Ernst Dorn, and was named radium emanation, but was not considered a noble gas until 1904 when its characteristics were found to be similar to those of other noble gases. (wikipedia.org)
  • liquid
  • Description: The SL Series Flow Computers consist of three panel-mounted display units for use with liquid and gas flowmeters. (globalspec.com)
  • Ramsay continued his search for these gases using the method of fractional distillation to separate liquid air into several components. (wikipedia.org)
  • purge
  • Helium's other industrial uses-as a pressurizing and purge gas, as a protective atmosphere for arc welding and in processes such as growing crystals to make silicon wafers-account for half of the gas produced. (wikipedia.org)
  • species
  • The ratio between these two species can be considered the hydrogen isotopic fingerprint of a substance. (wikipedia.org)
  • Charge-exchange ionization (also known as charge-transfer ionization) is a gas phase reaction between an ion and an atom or molecule in which the charge of the ion is transferred to the neutral species. (wikipedia.org)
  • mixture
  • One channel normally holds a reference gas and the mixture to be tested is passed through the other channel. (wikipedia.org)
  • typically
  • Mole sieve dryers at the inlet to the cryogenic recovery plant must dry the feed gas to a moisture concentration of typically less than 100 parts per billion (ppb, or 0.01 ppm). (environmental-expert.com)
  • optimum
  • This was confirmed by Johns & Thompson, who determined optimum operating parameters for each of the gases. (wikipedia.org)
  • known
  • To intensify the spectroscopic lines for publishable data, Murphy and Urey paired with Ferdinand Brickwedde and distilled a more concentrated pool of heavy hydrogen, known today as deuterium. (wikipedia.org)
  • The results are slower to obtain compared to a mass spectrometer, but the device is inexpensive, and has good accuracy when the gases in question are known, and it is only the proportion that must be determined. (wikipedia.org)
  • A well-known but minor use is as a lifting gas in balloons and airships. (wikipedia.org)
  • high
  • The mulitple gas capability and wide choice of flow controlllers-for high pressure, very low flows and corrosive gases-offer customers excellent application flexibility. (environmental-expert.com)
  • fuel
  • Novel procedures are described for the production of syngas fuel intermediates from abundantly available natural gas. (patents.com)
  • Because the process requires a large input of electrical energy, a plausible first step of implementation would be for American nuclear-powered aircraft carriers (the Nimitz-class and the Gerald R. Ford-class) to manufacture their own jet fuel. (wikipedia.org)
  • flow
  • One thing to be aware of when operating a TCD is that gas flow must never be interrupted when the filament is hot, as doing so may cause the filament to burn out. (wikipedia.org)
  • Set normal carrier gas flow (25-30 mL/min for 1/8" columns). (wikipedia.org)
  • make
  • If H2 is used as carrier, 20 mL/min N2 or He make-up should be provided through the normal FID H2 make-up line. (wikipedia.org)
  • chemist
  • After the expense of a new gas chromatograph, the last thing any chemist wants to see is a big smoking hole in the laboratory where the GC once stood because the wrong choice of carrier gas was made. (afrox-gas.co.za)