Standard Practice for Evaluation of Air Assay Media by the Monodisperse DOP
(Dioctyl Phthalate) Smoke Test (Withdrawn 2004)
WITHDRAWN, NO REPLACEMENT
Developed by Subcommittee: D22.01
The dioctyl phthalate (DOP) smoke test is a highly sensitive and reliable technique for measuring the fine particle arresting efficiency of an air or gas cleaning system or device. It is especially useful for evaluating the efficiency of depth filters, membrane filters, and other particle-collecting devices used in air assay work.
Formerly under the jurisdiction of Committee D22 on Sampling and Analysis of Atmospheres, this practice was withdrawn in December 2004. This practice is being withdrawn because the procedure is 34 years-old and the apparatus identified (the Optical Owl) is no longer available.
ATI Editorial Note: This standard, while withdrawn, was the commercial equivalent of Mil-Std 282 (1956) and is often referenced in relation to HEPA efficiency testing. Still available as a reference document, it provides an easy to understand explanation of the methodology and equipment used for challenging and photometrically qualifying HEPA media efficiency.