Guidelines are given for the sampling procedure for odour measurements with an olfactometer considering two sampling methods: the dynamic sampling where partial flow of the sample is continuously taken from the source and directly used to supply the olfactometer on demand and the static sampling where odorous samples are collected in vessels which are later connected to the olfactometer. General considerations are given regarding the sampling such as the possible condensation in the vessel or the instruments used, the interaction with the sample and the condensation surface and reactions among the odorants involved. The dynamic sampling and the static sampling methods are presented with figures showing the basic apparatus. Dynamic odour measurements are recommended for emission source that present stable period of odour concentration emissions, at least during the course of a single measurement. This method also presents advantages because of the short time elapsing between the sampling and the analysis; less chemical reactions in the sample can occur.

The sampling procedures are well presented and explained but not enough specific information is given for the apparatus. This could lead to differences between samplings done over long periods of time and also sampling and analysis done by different laboratory which could use the same sampling methods but no the same apparatus. References to VDI 3881 Part 1.