Record Display for the EPA National Library Catalog
RECORD NUMBER: 659 OF 2622
|OLS Field Name||OLS Field Data|
|Main Title||Development of an Active Personal Ozone Sampler Using a Hollow Tube Diffusion Denuder.|
|Author||Geyh, A. S. ; Wolfson, J. M. ; Koutrakis, P. ; Mulik, J. D. ;|
|CORP Author||Harvard School of Public Health, Boston, MA.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.|
|Additional Subjects||Ozone ; Air pollution sampling ; Risk assessment ; Indoor air pollution ; Health hazards ; Measuring instruments ; Ions ; Chromatography ; Air quality data ; Occupational exposure ; Air pollution monitoring ; Humidity ; Concentration(Composition) ; Performance evaluation ; Occupational safety and health ; HTD(Hollow tube denuder) ; Personal ozone sampler ; LOD(Limit of detection)|
Personal, microenvironmental and indoor ozone monitoring is currently conducted using a lightweight, inexpensive passive sampling device. Although the passive device is adequate for many studies, the authors are developing a relatively light weight active hollow tube diffusion denuder system which increases the sensivity of ozone measurements and reduces effects associated with variations in wind velocity, for improved personal monitoring. The new hollow tube denuder (HTD) system consists of a 1.4(ID) x 10(L) cm etched borosilicate glass tube attached to a small, low-flow, and relatively inexpensive personal pump. Tube diameter and length were chosen to maximize collection efficiency at a sampling rate of 65 mL/min. The tube is coated with a nitrite reagent which has been successfully used with passive ozone samplers.