scope:

Sampling is one of the most important aspects of olfactometry. The quality of the subsequent steps, such as olfactometric analysis, assessment and any measures derived from this depend on appropriately and correctly performed sampling.

The aim of sampling is to detect emissions issuing from an odour source by extracting suitable part volumes of the waste gas so that the typical properties of the source are recorded representatively for the task in question. The typical properties of a source are:

• change in emissions over time inclusive of peak emissions
• type of substance transition from the source into the atmosphere (conventionally measurable volumetric flow rate in the case of stationary sources; not conventionally measurable volumetric flow rate in the case of fugitive sources)
• geometric source configuration such as point, area and volume sources

The sampled process conditions, sampling duration and the number of samples shall be such as to supply information on the extent of odour exposure in the environment of the odour source on the basis of the odour emission data obtained and the subsequent dispersion calculation.

The present guideline is devoted to sampling with delayed olfactometry (static sampling). With this method, a part volume of the waste gas is extracted into suitable bags of odour-neutral material and analysed, immediately if possible, at the olfactometer. The dynamic sampling method has not become established in practice.

Im Sinne einer einheitlichen Vorgehensweise werden für einige Quellcharakteristika Konventionen getroffen, die es jedoch erlauben, die Geruchsstoffemissionen möglichst wirklichkeitsnah zu bestimmen. In den Fällen, in denen dies nicht möglich ist, wird auf weiteren Untersuchungsbedarf verwiesen.