Sulfur hexafluoride sources

Source. Production by-product of synthesis of sulfur hexafluoride... 

Uses and Sources. As a fluorinating agent in the production of water- and oil-repellant materials and lubricity improvers found as a degradation product of sulfur hexafluoride... 

Singh, H.B., Salas, L.J., Shigeishi, H., Scribner, E. (1979) Atmospheric halocarbons, hydrocarbons and sulfur hexafluoride Global distribution, sources and sinks. Science 203, 899-903. 

Busenberg E. and Plummer L. N. (2000) Dating young groundwater with sulfur hexafluoride natural and anthropogenic sources of sulfur hexafluoride. Water Resour. Res. 36, 3011-3030. 

Using one of these sources we have determined product yields from the radiolysis of cyclohexane and the effects on these yields of adding nitrous oxide, benzene, and sulfur hexafluoride. 

Other volatile tracers have been used in estuaries to determine gas exchange coefficients. These tracers, such as chlorofluorocarbons (CFCs) or sulfur hexafluoride (SFg), are synthetic compounds with no known natural source. Unlike Rn, these gases are stable in solution. These tracers may be added to the aquatic system and the decrease of the gas due to flux across the air/water interface monitored over time. In some estuaries, point sources of these compounds may exist and the decrease of the tracer with distance downstream may be used to determine k or z values for the estuary. 

In the use of an electronic leak detector method, a 2% mixture of sulfur hexafluoride in air is used as the test gas. Detector sensitivity is approximately the same as the detector mbe method of test. The presence of the radiation source in this detector, however, requires a special... 

Gaseous SF3 is a gentle and effective electrophilic monofluorinating reagent for flve-membered heterocyclic compounds. The reaction of thiophenes 1,7 with gaseous SF3, generated by electron ionization of sulfur hexafluoride and acting as a source of fluorine cation (F ), is one more example of a direct fluorination process [12],... 

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