Rule of Thumb for Chemical Detections webinar starts the second ChemProX webinar series including totally three webinars deepening the understanding of different aspects of handheld chemical detection. The other webinars included in this series concentrates on practical experiences of ChemProX trainings and the usage of additional information and databases in chemical detection.  The duration of this webinar recording is approx. 20 minutes, you can access the recording from HERE.