2.2 气味的定量表达方法 The quantitative expression of odor

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3. 气味持续性 (“剂量反应”) Odor Persistency (“Dose Response”):

气味持续性是这样一个词,它用来描述,当气味被稀释时比如在气味的下风向,人体对气味强度感应的减弱的速率。气味强度与相应所代表的气味浓度的比率会因气味物质不同而不一样。气味持续性关系是一个 “剂量反应”函数(一个精神物理指数函数) ,它是一个用下面等式表示的log-log尺度。

Log I = n Log C + log k

Odor persistency is a term used to describe the rate at which the perceived intensity decreases as the odor is diluted, i.e. in the atmosphere down-wind from the odor source. The rate of change in intensity versus odor concentration is not the same for all odors. This odor persistency relationship is a “Dose-Response” function (a psychophysical power function), which is linear on a log-log scale with the following equation:

Log I = n Log C + log k

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