> One of the conclusions was that resealing solvent bottles with Teflon tape brought VOCs to non-detectable concentrations. Does anyone know if they sealed under the cap (similar to how a plumber uses Teflon tape) or over the outside of the cap (similar to how chemists use parafilm)?

Good question. Fortunately, the authors also contributed an article to the Journal of Chemical Health and Safety on this work (see
https://doi.org/10.1016/j.jchas.2018.01.001 ). In this article, they describe this approach as "wrapping the threads of each solvent bottle with two layers of Teflon tape" as an alternative to "wrapping each solvent bottle neck and cap with Parafilm". They also tried putting the solvent containers in a plastic bag. As you noted, the teflon tape method did best.

So it sounds to me like they used the plumber-style approach to this.

Thanks for asking.

- Ralph

Ralph Stuart, CIH, CCHO
Environmental Safety Manager
Keene State College
603 358-2859

ralph.stuart**At_Symbol_Here**keene.edu

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