ASTM-E679 Standard Practice for Determination of Odor and Taste Thresholds By a Forced-Choice Ascending Concentration Series Method of Limits

ASTM-E679 - 2019 EDITION - CURRENT
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Standard Practice for Determination of Odor and Taste Thresholds By a Forced-Choice Ascending Concentration Series Method of Limits
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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.

Keywords

air pollution; ascending method of limits; odor; panel; sensory evaluation; taste; threshold; water pollution; ICS Number Code 67.240 (Sensory analysis)

To find similar documents by ASTM Volume:

14.03 (Temperature Measurement)

15.08 (Sensory Evaluation; Vacuum Cleaners; Security Systems and Equipment; Detention and Correctional Facilities; Homeland Security Applications)

To find similar documents by classification:

67.240 (Sensory analysis)

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Document Number

ASTM-E0679-19

Revision Level

2019 EDITION

Status

Current

Modification Type

Reapproval

Publication Date

Aug. 15, 2019

Document Type

Practice

Page Count

7 pages

Committee Number

E18.04