Thermodynamic treatment of passive monitors

Journal Article · Wed May 01 00:00:00 EDT 1985 · Am. Ind. Hyg. Assoc. J.; (United States)

DOI:https://doi.org/10.1080/15298668591394815· OSTI ID:5418068

Posner, J C; Moore, G

Previous mathematical descriptions of sampling using passive monitors have used Fick's First Law of diffusion and the assumption that the concentration of adsorbate in the vapor phase above the sorbent is zero. This paper shows that by introducing a simplified expression for the equilibrium vapor pressure, behavior more nearly resembling that observed for passive monitors is predicted. The theory can also be applied to the case of loss of sample from a diffusive monitor. Experimental evidence is also provided which demonstrates that the theory adequately describes the observed results.

• Research Organization: National Institute for Occupational Safety and Health, Cincinnati, OH
• OSTI ID: 5418068
• Journal Information: Am. Ind. Hyg. Assoc. J.; (United States), Vol. 46:5
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AIR POLLUTION MONITORS
THERMODYNAMICS
ADSORPTION
DIFFUSION
ERRORS
MATHEMATICAL MODELS
SAMPLING
THEORETICAL DATA
VAPOR PRESSURE
DATA
INFORMATION
MEASURING INSTRUMENTS
MONITORS
NUMERICAL DATA
PHYSICAL PROPERTIES
SORPTION
THERMODYNAMIC PROPERTIES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)