PREN 13725 : DRAFT 1999

1 Scope, validity and field of application
2 Normative references
3 Terms, definitions and symbols
4 Principle of measurement
5 Performance quality requirements
6 Materials, gases and panel members
7 Sampling
8 Presentation of odorants to assessors
9 Data recording, calculation and reporting
Annex
A (informative) Physiological principles
B (informative) Example of calculation of instrumental
                accuracy and instability
C (informative) Example of calculation of accuracy of
                odour measurements within one laboratory
D (informative) Example of calculations for panel
                selection
E (informative) Example of the calculation of the
                odour concentration from a set of
                panel member responses
F (informative) Example of the calculation used to
                determine the number of odour
                concentration measurements required
                to achieve a defined precision
G (informative) Example of the calculation used to
                determine the number of odour
                concentration measurements required to
                detect a difference between two means
H (informative) Example of the calculation of the odorant
                flow rate (standard conditions) for a wet
                emission
I (normative) Working conditions and working platform
                for sampling
Bibliography

Defines a method for the objective determination of the odour concentration of a gaseous sample using dynamic olfactometry with human assessors and the emission rate of odour emanating from point sources, area sources with outward flow and area sources without outward flow.