After discussion with our laboratory manager, this was his response. Hope this is helpful...... We use Purafil products to scrub formaldehyde out of our lab air. We started using Purafil Chemisorbant Media at first, but then switched to Purafil Odoroxidant SP Media. The reason is that the SP has about 3 times as much scrubbing capacity per pound. Also the Chemisorbant is about $4/lb, while the Odoroxidant SP is about $5/lb. A lot more bang for the buck -- and we certainly need this in our lab, since we are running the lab air system 24/365. Using Purafil, the average background level of formaldehyde in our lab is 1 part per billion (ppb), and the highest individual measurement over the last year was 3 ppb. The nearest local Purafil distributor for Boulder Colorado is in Denver, CO: Super Tech Filter Phone: 303-936-0500 2650 West 2nd Ave., #11 Denver CO 80219 Tanis Marquette Technical Compliance Manager Hexion Specialty Chemicals Columbus OHIO 614-225-3458 "Ringen, Sonja G."
DCHAS-L**At_Symbol_Here**LIST.UVM.EDU Sent by: DCHAS-L cc Discussion List [DCHAS-L] Formaldehyde filtration 04/28/2010 06:10 PM Please respond to DCHAS-L Discussion List We have a researcher who would like to occasionally vent small quantities (micrograms/cubic meter; maybe less) of formaldehyde from a vessel being developed to measure greenhouse gases. Because the vessel sits on a laser table, and there is no fume hood in the laboratory, we are hesitant to tell him to vent it into the room (especially since the building is old and there is very little turnover of the air in the room). IĠd like to find a filter for the exhaust before it goes outside, but have had trouble finding an effective filter. I know that activated charcoal is not very effective for such a small molecule. What do you use to filter formaldehyde from exhaust? Sonja Ringen Office of Safety, Health and Environment NIST/Boulder 325 Broadway, MC 173.02 Boulder, CO 80305 Phone: 303.497.7389 Mobile: 303.961.9251
Previous post | Top of Page | Next post