Dr. Daniel Köster studied Forensic Science (BSc.) at the University of Applied Sciences Bonn-Rhein-Sieg, Germany and Robert Gordon University (BSc. hons), Scotland. After a MSc. course in Water Science at the University of Duisburg-Essen in Germany he joined the research group for Instrumental Analytical Chemistry of Prof. Dr. Schmidt at University of Duisburg-Essen. He received his PhD degree in 2020 at the same institution. In 2020 he joined the Institute for occupational safety and health of the German social accident insurance where he works as a research chemist for HPLC applications in the department for Chemical and Biological Hazards.