The seminar titled "Analysis of Organic Pollutants in Water with Twister GC-MS/MS" organized by TUBITAK Marmara Research Center Environment and Cleaner Production Institute and SEM Laboratory Devices was held on October 25, 2016. Pieter Stoutjesdijk (Gerstel, Germany), David Benanou (Veolia, France), Nihat Öztürk (Agilent Turkey), Kartal Çetintürk (SEM) and Dr. Oltan Canlı (TÜBİTAK MAM ÇTÜE) took part as speakers in the one-day event and informed the participants about the latest developments in sample preparation for the analysis of organic pollutants in water with Twister GC-MS/MS. The seminar was successfully completed with twister applications on water samples.