Odor recognition concentration

TABLE III.1 Odor Recognition Concentration and Odor index of Seiected Compounds... 

Compound/Class Odor Recognition Concentration (100%) Odor Index ... 

Table III.l presents the 100% odor recognition concentrations and the odor index for some selected classes of compounds that are hazardous (toxic and/or flammable). It may...

One method of controlling response perseveration and other anticipation factors is to use a forced choice response indication based on two or more response categories. In the measurement of odors the panelist has to report the temporal position of positive stimuli in a series of random blanks. If the concentration is below the threshold, the test subjects will guess. As the odorant concentration will increase, the relative cumulative frequency for identification of the correct sample will be greater. In order to determine the relative odor recognition a correction must be made. 

Colorless, very mobile liquid with a very strong, acetic acid-like odor. Experimentally determined detection and recognition odor threshold concentrations were <600 pg/m (<140 ppbv) and 1.5 mg/m (360 ppbv), respectively (Heilman and Small, 1974). 

Clear, colorless liquid with a rancid sweet odor similar to fusel oil. Experimentally determined detection and recognition odor threshold concentrations were 900 pg/m (300 ppbv) and 3.0 mg/m (1.0 ppmv), respectively (Heilman and Small, 1974). Odor threshold concentration in water is 500 ppb (Buttery et al, 1988). The least detectable odor threshold in concentration water at 60 °C was 0.2 mg/L (Alexander et al., 1982). Cometto-Muniz et al. (2000) reported nasal pungency threshold concentrations ranging from approximately 900 to 4,000 ppm. 

Colorless, flammable gas with a strong ammonia-like odor. An experimentally determined recognition odor threshold concentration of 21 ppbv was reported by Leonardos et al. (1969). Odor threshold concentrations of 4.7 ppmv and 35 ppbv were experimentally determined by Nishida et al. (1979) and Nagata and Takeuchi (1990), respectively. 

Obsession, 103,105, 123,125-126,139, 270 Odor effects diagram, 151 Odor intensity, related to concentration, 247-249 Odor strength, inherent, 163. 166 Odor value, 163,166, 249-259 Odor volume, 152. 153. 162 Olfaction anatomy, 76 evolution, 75 and odor recognition, 25 Olfactometer, 244 Olfactory sensitivity, see Sensitivity... 

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