Comparison of Standards of Olfactometry
Presented to EE-6 Odor Committee
at AWMA 1999 Annual Meeting, St. Louis, MO

prEN 13725
(Sept. 1999 DRAFT) †‡

ASTM E-679-91

A&WMA EE-6

Requirements

           

Dynamic Dilution

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Triangular Forced-Choice

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Ascending Concentration Series

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Odor Free Dilution Air

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Presentation Flow Rate (lpm)

20

- - -

8

Presentation Face Velocity (m/s)

0.2 - 0.5

- - -

0.02 - 0.05

Presentation Mask Diameter (cm)

3 - 5

- - -

6 - 10

Maximum Lower Dilution Ratio

2^7

- - -

2^3

Minimum Upper Dilution Ratio

2^14

- - -

2^13

Dilution Ratio Range

2^13

- - -

- - -

Dilution Factor Between Levels

1.4 - 2.4

2.0 or 3.0

2

Includes Sampling Requirements

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Includes Olfactometer Performance Criteria

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Includes Assessor Performance Criteria

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†  This standard will supersede NVN 2820 (Netherlands), VDI 3881 (Germany) and all other European Standards.
‡  Australia & New Zealand have drafted an equivalent standard.

*  The CEN Draft also allows Binary Forced Choice, Yes/No Procedures, and Forced Choice Probability Methods.

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