EPA Method 8141B: Organophosphorous Pesticides Using Automated Solid Phase Extraction (SPE)

EPA Method 8141B describes the performance based procedure to determine low ppb levels of organophosphorous pesticides in ground water. The OP pesticides are extracted using solid phase extraction (SPE) based on the procedure outlined in Method 3535A for OP pesticides by Method 8141. The analysis is performed with capillary GC using a FPD (flame photometric detector). This initial demonstration of capability was conducted using the Biotage® Horizon 4790 Automated Extractor System. This application note describes implementation of this method using Biotage® Horizon 5000; 4790 and VacMaster Disk systems.