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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 Formulation Summit

Leonardo Royal Hotel, London
29 - 30 November

SCC 75th Annual Scientific Meeting & Showcase

Sheraton NY Times Square (New York)
13-15 December 2021

in-cosmetics Global 2022 - Paris

1 Pl. de la Porte de Versailles, Paris
5 - 7 April 2022

32nd IFSCC Congress

Park Plaza Hotel, Westminster
19-22 September 2022

in-cosmetics Asia 2022

BITEC Bangkok, Thailand
1 - 3 November 2022

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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