ASTM E679, Standard Practice for Determination of Odor and Taste Thresholds by a Forced-Choice Ascending Concentration Series Method of Limits, was officially re-approved. St. Croix Sensory Lab Directory, Mike McGinley was task group chair responsible for this standard revision.
ASTM E679 is a primary method of olfactometry used in the measurement of odor thresholds for environmental odors as well as quantification of product/material odors. This standard was first published in 1979 with revisions approved in 1991 and 2004. The most significant revisions in 2004 highlighted consistency with the European olfactometry standard, EN13725:2003.
In this new edition, now designated E679-19, only minor revisions were made related to terminology and reference documents. There were no substantive changes to methods or procedures.