odour detection threshold

Odour intensity is the relative perceived psychological strength of an odour above its odour detection threshold.

In summary, the odour concentration of a sample indicates the number of dilutions required to reach its odour detection threshold level.

Odour concentration is the odour strength expressed in terms of the number of times the sample has to be diluted to reach its odour detection threshold.

The proposed aesthetic objective (AO) for MTBE is therefore 0.015 mg/L, based on odour detection thresholds.