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- Research methods and measures:
- Chromatography
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1/1/1974 - Reports of InvestigationsThe Bureau of Mines found sulfur hexafluoride (SF6), released from a lecture bottle, to be an ideal gaseous tracer for studying mine ventilation systems. In a Pennsylvania limestone mine, this technique was useful in evaluating the effectiveness of auxi...
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1/1/1973 - Reports of InvestigationsTo determine if coals from mines which had no history of detectable gas emission contained adsorbed methane, samples of coal at the shaft bottom and at an active face were obtained and placed in sealed metal cylinders.
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Content source: National Institute for Occupational Safety and Health, Mining Program