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At the limits of the sense of smell

Olfasense has developed standardised methods for the determination of odour threshold values for a great variety of compounds

We have all experienced at some time, shortly after the first raindrops fall, that characteristic and evocative smell known technically as petrichor; a combination of words from Greek mythology, ‘petri’ (rock) and ‘ichor’ (the ethereal blood of the gods). Petrichor is often described as the smell of wet stone, but the odour does not come from the stone minerals themselves. Layers of volatiles can accumulate on the stone surfaces, for example those emitted by microbes and plants, and are modified by the atmosphere. These volatiles are often not well perceivable, unless we put our noses up close. Raindrops can drive them out of their stone surfaces and make them better noticeable. One of the organic molecules enhanced by rain, whose smell we colloquially describe as ‘wet earth’, is the so called 4,8a-dimethyl-decahydronaphthalene4a-ol. This odorant also known as geosmin comes from the Greek, meaning ‘aroma of the earth’ because of its sm

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Upcoming Events

in-cosmetics Korea 2022

Hall C, Coex, Seoul, South Korea
13 - 15 July 2022

PCHi China 2022

Shanghai World Expo Exhibition & Convention Center
18 - 20 July 2022

32nd IFSCC Congress

Park Plaza Hotel, Westminster
19-22 September 2022

in-cosmetics Latin America 2022

Expo Center Norte, Sao Paulo
21 - 22 September

Cosmetorium 2022

Palau de Congressos de Barcelona
28 - 29 September

SEPAWA 2022

Estrel Congress Center, Berlin
26 - 28 October

Access the latest issue of Personal Care Magazine on your mobile device together with an archive of back issues.

Download the FREE Personal Care Magazine app from your device's App store

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