A
concentration of 5 ppm of ozone was used for the experiments,
using a voltage of 3.4 V, flow rate of 2 standard lpm and pressure of
6 psi. Samples were placed on the bed during 3, 6, 9, 12 and 15 min.
At the exit, the ozone concentration of the chamber was confirmed
with a precision gas mass flowmeter (Apex, Canton,GA). Equipment
was calibrated with an iodine wet chemistry method to quantify
ozone concentration