So, a graduate student, huh?
How come you guys can go to
the moon but you can't make
my shoes smell good?
Homer Simpson (1994)
1
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Introduction to Odor - Air Pollution - Lecture Slides, Slides of Ecology and Environment
Introduction to Odor, National Geographic, My World of Odors, Animal Mortalities, Lion'S Urine, Environment, Gas Chromatography, Non-Nose Sensors, Electronic Noses, Real-Time Analyzers are the key points from this lecture. Major topics in this course Air Pollution are: Meteorology, Noise Pollution, Climate change, Flue gas treatment, Indoor air quality, Mobile Sources, Odor and Dispersion.
Typology: Slides
2012/2013
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So, a graduate student, huh?
How come you guys can go to
the moon but you can't make
my shoes smell good?
Homer Simpson (1994)
Introduction to Odor
National Geographic
September 2007 (Polish edition)
(by Magda Tilszer)
Heras Joel/Biosphoto/Photolink docsity.com
My world of odors
- Livestock and poultry odor
- Vodka
- Insects
- Biofuels
- Wine
- Human breath
- Animal mortalities
- Indoor air
- Spices
- Lion‟s urine
- Particulate matter
Link between VOCs & odor with SPME-multidimensional GC-MS-Olfactometry
- Wright et al., 2005
- Bulliner et al., 2006
- Cai et al., 2006
- Cai et al., 2007
- Koziel et al., 2007
- Lo et al., 2008 docsity.com
So the key question is…
- …what causes the characteristic smell of concrete
and steel? (materials are evidence of smells from
environment)
Odor measurement with
non-nose sensors
- What compounds
cause problems?
- Why odor mitigation
works?
- Sensor arrays (a.k.a.
„electronic noses‟)
- ppb – ppm
- evolving technology
- principal component analysis (PCA)
- PCA almost always “work”
10
- Real-time analyzers
- Total VOCs or specific compounds (NH 3 , H 2 S)
- ppb – ppm
- gas concentrations
- mature technology
- Gas chromatography
- separation of VOCs including odorants
- MS, FID, PID, PFPD, …
- ppq – ppt
- gas concentrations
- mature technology
Long-term goals
- Solving livestock odor problem
- Solving odor problems
- Bad breath
- Ladybugs
- Food (e.g., wine)
- Consumer products
- Nuisance and air quality
Approach
- Simultaneous chemical + olfactometry analysis
- GC-Olfactometry approach
- Identification of key compounds responsible for odor
“finding stinky „needles‟ in the haystack of odor”
- Methods development for field measurements
- Development and evaluation of odor control technologies
Odor
docsity.com^11
Simultaneous chemical and odor analysis
SPME-MDGC-MS-Olfactometry system
SPME
Simultaneous chemical and odor analysis
Sorbent tubes-MDGC-MS-Olfactometry system
14
Sampling pump
Sorbent tube, Sorbent tube,Break through Sample
On-line flow meter
Finding characteristic, odor-defining
compounds
Recording odor events in Aromagrams
Characterizing odor caused by separated
chemicals from one sample
Odor Character (^) Hedonic tone Odor Intensity
Simultaneous chemical and olfactometry
analysis of odor
Trace levels of gases cause significant odorsTrace levels of gases cause significant odorsTrace levels of gases cause significant odors