Gas tracer composition and method

Gas: heating and illuminating – Distribution – Leakage

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405 53, 405 54, 436 3, 436 56, 73 407, E21F 1700, B65G 500, F17D 304, G01N 3322

Patent

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045511543

ABSTRACT:
The invention provides a method for tagging methane by adding thereto one or more of the tracer compounds sulfur hexafluoride and chloropentafluoroethane. The methane being tagged is noramlly being stored in underground storage fields to provide identity and proof of ownership of the gas. The two tracer compounds are readily detectable at very low concentrations by electron capture gas chromatography apparatus which can be made portable and thus suitable for use in the field.

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Peterson et al, Technical Bulletin 79-1, "In Situ Characterization of Permeability, Porosity and Communication in Underground Regions", Systems, Science and Software, May 1979.
Timko et al, "SF.sub.6 Adds a New Dimension to Mine Ventilation Analysis", Engineering and Mining Journal, Feb. 1984, pp. 50-51.
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