1. GROUND-BASED CHEMISTRY IN BENIN Measurements of VOCs

2. Why? Scarcity of measurements in the region –Southern Africa –North Africa –Central Africa –East Africa Aircraft measurements are relatively coarse

3. Where? Djougou (Dominique Serça, Fabienne Lohou, Cathy Liousse, Aérologie Laboratoire, Toulouse, France)

4. What? Organic gas phase species –Biogenic –Combustion products

5. How? Local botanist Collect samples Analyse by GC-MS

6. Tube microsampler (TMS) Mass flow controller, Timing control Peltier temperature controller

7. Isoprene Monoterpenes GC-MS Separation

8. GC-MS Identification

9. Proposed Sampling Strategy Survey Diurnal profile Intensive Emission rates