Evaluating the toxicity of urban patterns of oxidant gases. I. An automated chronic gaseous animal inhalation exposure facility
- 30 April 1987
- journal article
- research article
- Published by Taylor & Francis in Journal of Toxicology and Environmental Health
- Vol. 21 (1-2) , 89-97
- https://doi.org/10.1080/15287398709531004
Abstract
An automated animal inhalation exposure facility was designed to conduct chronic exposures of rodents to gaseous pollutants. The facility consisted of 3 walk‐in chambers with modular cages to allow for exposure of up to a maximum of 480 mice or 240 adult rats. Critical parameters of operation, such as relative humidity, pollutant concentration, and temperature, were monitored continuously. Failure of the system to maintain parameters within specified limits activated the alarm system. Distribution of test gases in the chambers was evaluated for homogeneity, and the standard deviation was determined to be within ±5% of the target concentrations throughout the chamber. The exposure facility was successfully used to expose 720 rats to diurnal patterns of O 3 (baseline of 0.06ppm for 13 h with an exposure peak to 0.25 ppm over 9 h) and NO 2 (baseline of 0.5 ppm for 16 h with an exposure peak to 1.5 ppm over 6 h) for a period of 18 mo.Keywords
This publication has 2 references indexed in Scilit:
- Microprocessor-controlled inhalation system for repeated exposure of animals to aerosolsReview of Scientific Instruments, 1979
- A system for the long‐term continuous exposure of laboratory animals to mixtures of air pollutants1Journal of Environmental Science and Health . Part A: Environmental Science and Engineering, 1977