Chemical substances used, handled or produced as By-products in various processes in industry disperse in the work atmosphere as Gases, Vapours and Aero-sols. The absorption of the chemicals, above a certain dose range, may lead to the causation of various adverse effects on the health of these persons. It is essential to evaluate the levels of pollutants in the work environment to find out whether the levels are within the permissible limits.
Air from the work environment is taken at a selected flow rate
and allowed to pass through suitable sampling device where
the pollutants are collected and lateron analysed in the lab
with appropriate analytical technique
