Full Description

Ozone is a highly toxic reactive gas that has an increasing application in wide industrial and environmental operations. The exposure limits of ozone for workplaces are low as commonly in 100 ppb or less; therefore, accurate measurement of ozone concentration in workplaces is crucial for protecting workers health and safety. Ozone can be readily decomposed within the sampling tube due to chemical reactions with the tubes inner surface or other contaminants inside the tube. The tube material should be resistant to ozone and, more importantly, inert to ozone reaction. PTFE, FEP, and austenitic stainless steel are suggested to use for ozone sampling. Besides, silicone and Vitoncommon soft tubing materialsare known to be ozone-compatible. This paper tested eight different tubing materialsPTFE, FEP, stainless steel 316, stainless steel 304, Viton, Silicone, Tygon PVC, and FEP lined Tygon PVC (Tygon SE200)to investigate how they affect the ozone measurements. We monitored the ozone concentration from the inlet and the outlet of each line for 1 h. At 100 ppb of ozone, the ratios of the outlet ozone concentration to the inlet are measured between 0.27 and 1.0. The effects of ozone concentration and humidity are also investigated. Except for PTFE, FEP, and Tygon SE200, the rest of the tested tubing materials showed reductions in the ozone monitor readings, causing false assurance of ozone exposure.

Product Details

Published: 2022 Number of Pages: 7 Units of Measure: Dual File Size: 1 file , 1.3 MB Product Code(s): D-IIVC2022-C042 Note: This product is unavailable in Russia, Belarus