Indoor simulation of insecticides supplied with an electric vaporizer by the fugacity model

Abstract

From a viewpoint of safety assessment of insecticides being released with an electric vaporizer into a room a modified unsteady state Fugacity model (VAPOR-MOM) has been developed to simulate temporal variations of concentrations or amounts of active ingredient (ai) in air, on floor, wall and ceiling under various conditions. The model predicted behavior of ai in a quantitative sense in the concerned compartments due to variations of air exchange rate, photo-degradation and oxidation rate, transfer rate and physicochemical properties of ai. A simulation experiment showed that the time-dependent aerial concentrations of vaporous ai entirely agreed with measured ones. The model will be very useful to describe accurately concentrations of ai in various compartments by utilizing known, calculated, or easily available data of the rooms, formulations, use patterns, physicochemical properties without realization of experiments.