A portable inhalation system for personal exposure to ozone.
Arch Environ Health
; 51(2): 138-45, 1996.
Article
en En
| MEDLINE
| ID: mdl-8638965
ABSTRACT
A low-cost portable inhalation system was developed for exposing an individual subject to 60-600 parts per billion of ozone in a 30-l clear-plastic head dome. The inhalation system had the following novel features a canister vacuum cleaner that supplied room air without the need for precleaning or humidification; a 7% oxygen-in-nitrogen feed to a commercial ultraviolet ozonator that avoided an excess production of ozone; a compact inline mixer that assured homogeneous mixing of the 200-300 liters per minute room air supply with the 0.5-1.0 liters per minute of ozonated gas flow, positioning of gas inlet and exhaust hoses on the head dome that provided fresh gas delivery in the vicinity of the mouth; a quick-disconnect neck seal that allowed rapid donning of the head dome by the subject, and mounting of most system components on a small mobile cart. Temperature, humidity, and ozone and carbon dioxide concentrations were measured inside the dome while a subject exercised on a bicycle ergometer. An air flow of 200 liters per minute between rest and light exercise created a suitable microenvironment in the dome. During moderate and heavy exercise, however, a higher flow of 300 liters per minute should be used to suppress the build-up of carbon dioxide and humidity.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Ozono
/
Cámaras de Exposición Atmosférica
Tipo de estudio:
Diagnostic_studies
/
Evaluation_studies
Límite:
Adult
/
Humans
/
Male
Idioma:
En
Revista:
Arch Environ Health
Año:
1996
Tipo del documento:
Article
País de afiliación:
Estados Unidos