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Standard Practice for Determination of Odor and Taste Thresholds By a Forced-Choice Ascending Concentration Series Method of Limits
Automatische name übersetzung:
Standard Praxis zur Bestimmung des Geruchs- und Geschmacksschwellenwerte Durch ein Forced-Choice Aufsteigend Konzentration Series Art der Limits
NORM herausgegeben am 1.8.2011
Bezeichnung normen: ASTM E679-04(2011)
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 1.8.2011
SKU: NS-47632
Zahl der Seiten: 7
Gewicht ca.: 21 g (0.05 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Keywords:
air pollution, ascending method of limits, odor, panel, sensory evaluation, taste, threshold, water pollution, ICS Number Code 67.240 (Sensory analysis)
Significance and Use | ||||||||||
Sensory thresholds are used to determine the potential of substances at low concentrations to impart odor, taste, skinfeel, etc. to some form of matter. Thresholds are used, for example, in setting limits for air pollution, in noise abatement, in water treatment, and in food systems. Thresholds are used to characterize and compare the sensitivity of individual or groups to given stimuli, for example, in medicine, in ethnic studies, and in the study of animal species. |
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1. Scope | ||||||||||
1.1 This practice describes a rapid test for determining sensory thresholds of any substance in any medium. 1.2 It prescribes an overall design of sample preparation and a procedure for calculating the results. 1.3 The threshold may be characterized as being either (a) only detection (awareness) that a very small amount of added substance is present but not necessarily recognizable, or (b) recognition of the nature of the added substance. 1.4 The medium may be a gas, such as air, a liquid, such as water or some beverage, or a solid form of matter. The medium may be odorless or tasteless, or may exhibit a characteristic odor or taste per se. 1.5 This practice describes the use of a multiple forced-choice sample presentation method in an ascending concentration series, similar to the method of limits. 1.6 Physical methods of sample presentation for threshold determination are not a part of this practice, and will depend on the physical state, size, shape, availability, and other properties of the samples. 1.7 It is recognized that the degree of training received by a panel with a particular substance may have a profound influence on the threshold obtained with that substance (1). 1.8 Thresholds determined by using one physical method of presentation are not necessarily equivalent to values obtained by another method. |
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2. Referenced Documents | ||||||||||
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Historisch
1.8.2011
Historisch
1.10.2013
Historisch
15.10.2012
Historisch
1.9.2014
Historisch
1.10.2013
Historisch
1.11.2013
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