GROUND-BASED CHEMISTRY IN BENIN Measurements of VOCs.

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Presentation transcript:

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-MS Separation

GC-MS Identification

Proposed Sampling Strategy Survey Diurnal profile Intensive Emission rates