Canadas Experience with Acrolein Measurements Using Canisters Preliminary

Canada’s Experience with Acrolein Measurements Using Canisters – Preliminary Results Tom Dann, Daniel Wang Environment Canada - Ottawa NESCAUM Monitoring and Assessment Committee Meeting NESCAUM Monitoring and Assessment Troy, NH April 24/25, 2007 Environment Environnement Canada

Current Acrolein Levels in Canada – DNPH Method (2000 – 2006)

Stability Results for Acrolein in Canisters – no cleaning

Stability Results for Acrolein in Canisters – with steam cleaning

Steam–Cleaning of Canisters n n n The canister is evacuated to vacuum, 100 ml of water is added (6 liter canister) and pressured to 10 – 15 psi with zero air. The canister is placed into the oven with valve outside of the oven. The oven is heated to 160 °C for 48 hours. After 48 h the canister is removed from the oven upside down and the canister valve is opened to release steam and water into the sink under the canister pressure. The canister is then evacuated on the vacuum line for several hours to remove the remaining water. Finally, the canister is cleaned on the canister cleaning system with several cycles of evacuation and purging with humid UHP air. Caution: Take special precautions when working with steam under pressure.

Steam–Cleaning of Canisters using Xontech Oven