ASTM-E679 2004

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E679-04 Standard Practice for Determination of Odor and Taste Thresholds By a Forced-Choice Ascending Concentration Series Method of Limits

Published By	Publication Date	Number of Pages
ASTM	2004	7

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Category: ASTM

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Description

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.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents
2	Terminology Summary of Practice Significance and Use Preparation of Concentration Scale
3	Judgment Procedure Data Evaluation Report Precision and Bias
4	Keywords X1. EXAMPLE NO. 1—DIFFERENCE THRESHOLD OF ETHYL ACETATE ADDED TO BEER X1.1 X1.2 X1.3 X1.4 X1.5 Report TABLE X1.1
5	X2. EXAMPLE NO. 2—ODOR THRESHOLD DETERMINATION X2.1 X2.2 X2.3 X2.4 X2.5 Report TABLE X2.1
6	X3. EXAMPLE NO. 3—ODOR THRESHOLD DETERMINATION X3.1 X3.2 X3.3 X3.4 X3.5 Report X3.6 Additional examples TABLE X3.1
7	REFERENCES

Additional information

Standard Title	E679-04 Standard Practice for Determination of Odor and Taste Thresholds By a Forced-Choice Ascending Concentration Series Method of Limits
Published Code	ASTM
Publication Date	2004
Pages Count	7

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ASTM-E679 2004

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