Alfred Wegener Institute, Biologische Anstalt Helgoland, had its focus in the last years on method development and investigations for the analysis of microplastics in the aquatic environment. Great emphases were laid towards sampling and sample extraction. These were harmonized for various sample types as part of the JPI-Oceans BASEMAN project. In addition, our analysis by FTIR chemical imaging microscopy was made open for harmonization by automated analysis using siMPle with published reference databases for MP and microfibers. In addition, AWI provides a broad research experience for MP which was already part of various national and international projects for covering different environmental compartments. The overall experience lead to a large number of published studies ranging from Arctic Sea ice, snow, surface waters, (deep sea) sediments, treated waste water towards drinking water for human consumption. Within the EUROqCHARM project, AWI is a task leader in WP1 and pays major contributions to WP2 and WP3.