Error bounds in diffusive sampling with reversible adsorption.
Diffusive samplers are commonly used in the work place for compliance monitoring of gases and vapors. Because the workplace concentrations of analyte are not constant, the usual procedure of calibration of a diffusive monitor by exposure to a known constant concentration of analyte may lead to an unacceptable error. By considering the maximum possible error in the time weighted average (TWA) concentration, with no restrictions regarding the concentration as a function of time, a permissible sampling time is defined that is consistent with any possible concentration fluctuation.
Underhill
D W
DW
Department of Environmental Health Sciences, School of Public Health, University of South Carolina, Columbia, SC 29208, USA.