SELECTED AND STANDARDIZED VALUES OF SUPRATHRESHOLD ODOR INTENSITIES FOR 110 SUBSTANCES

The suprathreshold olfactory intensity of pure substances canbe expressed as a function of three biological parameters characteristicof each substance. These parameters are: the detection threshold, the slope ofperceived intensity versus concentration in log. log. coordinates,and a ceiling to this slope of either physical or biologicalorigin. This study represents an attempt at compiling thresholds, intensityslopes and slope limits determined by many authors, and theselection and standardization of these data based on objectivecriteria. The selected results include 110 slopes, 124 thresholds,78 biological limits and 110 physical limits.