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GROUND-BASED CHEMISTRY IN BENIN
Measurements of VOCs
Why?
• Scarcity of measurements in the region– Southern Africa– North Africa– Central Africa – East Africa
• Aircraft measurements are relatively coarse
Where?Djougou
(Dominique Serça, Fabienne Lohou, Cathy Liousse, Aérologie Laboratoire, Toulouse, France)
What?
Organic gas phase species
– Biogenic
– Combustion products
How?
• Local botanist
• Collect samples
• Analyse by GC-MS
Tube microsampler (TMS)
• Mass flow controller,• Timing control• Peltier temperature controller
Isoprene Monoterpenes
GC-MSSeparation
GC-MSIdentification
Proposed Sampling Strategy
• Survey
• Diurnal profile
• Intensive
• Emission rates
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