Evaluation of an electrochemical sensor and comparison with spectroscopic approaches as used today in practice for harm reduction in a festival setting?A case study: Analysis of 3,4?methylenedioxymethamphetamine samplesAbstract, Deconinck, Eric, Polet Marie, Canfyn Michael, Duchateau Céline, De Braekeleer Kris, Van Echelpoel Robin, De Wael Karolien, Gremeaux L., Degreef Maarten, and Balcaen Margot , Drug Testing and Analysis, Jan-09-2024, Volume 16, Issue 9, (2024)