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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 32,
  • Issue 3,
  • pp. 320-321
  • (1978)

Continuous Flow Purging of Infrared Spectrophotometers Using Oil-pumped Compressed Air

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Abstract

To achieve optimal performance most infrared spectrophotometers must be purged with a nonabsorbing gas substantially free from water vapor and carbon dioxide. Two types of systems are in common use. One uses a closed circuit in which the gas is cycled through the instrument and a dryer. In the alternative system fresh gas is supplied continually to the instrument and allowed to disperse into the atmosphere.

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