1. G.A.S. Gesellschaft für analytische Sensorsysteme mbH - Trace Detection of VOCs in different Applications using Gas Chromatography - Ion Mobility Spectrometry (GC-IMS)

2. Company History:  Founded in 1997 as spin-off of the ISAS - Leibniz-Institut für Analytische Wissenschaften e.V.  Located in Dortmund TechnologyCentre  Interdisziplinary team of 13 employees consisting of chemists, electrical, mechanical and computer engineers  Development, production and distribution of analytical instruments based on Ion Mobility Spectrometry customized to application and customer requirements G.A.S. – Gesellschaft für analytische Sensorsysteme mbH

3. G.A.S.: Coupling of IMS to GC for complex Matrices Advantages of the GC: overcomes uncalculable ion chemistry fast (typically 3-15 min) field aproved changeable by user (5 min.) Advantages of IMS Sensitive for VOCs: Detection limit - low ppbv / µg/L range Specific drift times due to substance characteristic ions Special: Can distinguish isomeres Approved technology: in military and security field GC IMS

4. G.A.S.-Systems: Customized Sampling GC-IMS and A-IMS BreathSpec ® FlavourSpec ® Detection of VOCs in gases Detection of traces of VOCs in exhaled human breath Detection of traces of VOCs in the headspace of solid, liquid samples in food Sampling Set-up Pump 6-port-valve New: Gas circuit unit for purge gas Sampling Set-up Medical spirometer (flow/CO 2 /O 2 ) Pump 6-port-valve Sampling Se-up Automated sampling unit for HS of liquids and solids Syringe injection into heated injector

5. G.A.S. Systems and Applications

6. UV-IMS Summary Pattern /”Fingerprint” for a certain class/attribute (good, bad, fresh etc.) Single substances can be identified due to characteristic IMS chromatogram and NIST-based data based Detection limits for VOCs in the low ppb v / µg/L range Short total analysis run times of typically 3-15 minutes No sample preparation necessary Rugged, no consumables (only N 2 or synthetic air) Easy to use