Thanks Chris and Diane – some useful
links there.
And Chris – although I wasn’t
sure, you have confirmed my suspicion that we do become ‘immune’ to
smells.
This was a request for screening, but I
still don’t know whether it was to check for anosmia following chemical
exposure, or to confirm the ability to detect a smell indicative of a hazard. I
am assuming the latter!
Thanks to everyone who replied
Cathy
Cathy Howells RGN BSc(Hons) SCPHN(OH)
Occupational Health Advisor
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From:
[log in to unmask] [mailto:[log in to unmask]] On Behalf Of Chris Packham
Sent: 19 July 2012 06:47
To: [log in to unmask]
Subject: Re: [OCC-HEALTH]
olfactory testing
I
would be very cautious on relying upon any person’s sense of smell as a
reliable detection medium. I well remember some years ago visiting the packing
department of a well-known company manufacturing cough sweets. On entering the
workplace the smell was overpowering and my eyes quickly began to stream with
tears. However, within a few minutes this had stopped and the smell had
virtually disappeared as far as I was concerned. It is called olfactory
saturation. On leaving the plant, however, there was a very pronounced smell of
pollution that I had not noticed before! Again, this disappeared after a few
minutes.
With
some substances the human nose can detect the odour at levels well below the
hazard threshold, but once the threshold has been arrived at the human nose
cannot detect the smell any more.
Furthermore,
how do you allow for someone who has tested normally should they develop a cold
and effectively lose their sense of smell?
There
are devices on the market to detect the smell of a particular chemical. (Think
of the breathalyser). They are used, for example, in the perfume industry as
they produce consistent results, something that most humans are unable to do.
Chris
Packham
FRSPH,
FIIRSM, FInstSMM, MCMI, MBICSc
EnviroDerm
Services
Unit
10, Building 11, The Mews,
Tel:
+44 1386 832 311 (office), Mobile: +44 7818 035 898
www.enviroderm.co.uk
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