Performance of thick-sorbent diffusive samplers.
Authors
Bartley-DL; Woebkenberg-ML; Posner-JC
Source
Ann Occup Hyg 1988; 32(3):333-343
Abstract
A study of the performance of thick sorbent diffusive samplers was presented. A mathematical model was compared to results of an experiment employing the Draeger ORSA5 sampler response to trichloroethylene (79016) concentration pulses over an 8 hour time period. A liquid sorbent sampler from GMD Systems was tested for measuring acetone (67641) and methanol (67561). The ORSA5 system was tested using activated charcoal. A weakly binding analyte, trichloroethylene was pumped into the sampler. Samples were taken at hourly intervals after the sampler was moved to a trichloroethylene free environment. The errors in estimates were between minus 17 and 51 percent with the extremes occurring at the beginning or end of the testing period. A similar test system using water as the sorbent and methanol and acetone as the analytes resulted in bias errors that were greater than the charcoal system. The authors conclude that if the analyte is weakly bound to the sorbents, materials can be lost to the atmosphere. With adequate information they may be appropriate samplers in some situations.
Keywords
NIOSH-Author; Air-sampling; Air-samplers; Chlorinated-hydrocarbons; Air-sampling-equipment; Sampling-methods; Air-sampling-techniques; Absorbers; Mathematical-models
CAS No.
79-01-6; 67-64-1; 67-56-1
Document Type
Journal Article
Source Name
Annals of Occupational Hygiene
