Particle and Gas Phase Interactions in Air Sampling.
Air Sampling Instruments for Evaluation of Atmospheric Contaminants, 8th Edition 1995:67-80
Particle and gas phase interactions during air sampling were reviewed and discussed in this chapter. Sources of errors due to particle and gas phase interactions included undesired chemical reactions occurring during sampling, measurement of a contaminant only in one phase, and using inappropriate techniques to measure contaminant distribution. The distribution of an air contaminant between the two phases and the changes occurring in that distribution during sampling may depend upon the saturated vapor concentration of the contaminant, the total airborne concentration of the contaminant in the atmosphere, the concentration and composition of particles in the atmosphere, and the temperature, pressure, and gas phase concentration of the contaminant. It may be more important to measure the total airborne concentration of the contaminant. There appeared to be no universally acceptable technique to measure the distribution of a contaminant between the two phases. Measuring the distribution has been more difficult than measuring the total airborne concentration.
Airborne-particles; Air-sampling; Physical-properties; Air-quality-measurement; Sampling-methods; Chemical-reactions; Particle-aerodynamics;
Air Sampling Instruments for Evaluation of Atmospheric Contaminants, 8th Edition