Weber-Fechner Curve    An Energy Development Facility (EDF) has been evaluated as an odor source to optimize the evaluation of odor persistency. The objectives were to identify the odor characteristics and intensity from the EDF and to determine the relative contribution and variability of the different odors emitted.

   The method includes using the Odor Profile Method to identify each odor character and intensity and using olfactometry as an odor dilution system to determine the persistency of the odor, i.e., the rate of decrease of an odor with dilution. The results showed that air coming from the EDF can pose a rancid and sweet odor nuisance for the community near the EDF and possibly a weak musty odor nuisance for the area further away from the EDF. 

  Hedonic tone Alternative husbandry methods are playing an increasingly important role in terms of animal welfare. In order to ensure that odour pollution from freely ventilated "animal welfare-friendly" fattening pig houses can be adequately taken into account in odour surveys for approval procedures in Germany, the odour annoyance and respectively the hedonic odour effect was investigated in more detail starting from these types of houses.

   The odour annoyance potential of three alternative fattening pig houses was investigated by creating polarity profiles according to guideline VDI 3940 part 4. It was found, that the annoyance potential of those alternative housing forms with natural ventilation and outdoor area as outdoor climate stimulus, as well as bedding (straw), is lower compared to conventional housing forms.

PT EN13725   The company Olfasense has opened the registration for the annual Proficiency Test for Olfactometry based on EN 13725:2003. Laboratories around the world are invited to participate in this edition to confirm compliance to the performance criteria of EN 13725:2003.

   The measurements for the proficiency test will be carried out between August 29th and September 9th, 2022, inclusive. If your lab is interested in participating in this interlaboratory proficiency test, you are encouraged to confirm your participation by May 27th, 2022, at the latest.

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