Fig. 5From: Matrix Matters: novel insights for the extraction, preparation, and quantitation of microplastics in a freshwater mesocosm studyHPLC/HR-MS chromatograms of 3-cyano-4-methoxy-N-methyl-2-pyridone (m/z 164.16) detected in sediment sample extractions and extractions of sediment spiked with PU microplastics (10, 50, 100Â mg PU)Back to article page