An optimized processing method for polar organic chemical integrative samplers deployed in seawater: Toward a maximization of the analysis accuracy for trace emerging contaminants

•A specific processing method, required for POCIS deployed in seawater, was optimized.•Analyte recovery significantly differed in simulated and real samples.•Optimal matrix effect and recovery from fouled POCIS extracts were attained.•Most of the investigated contaminants were detected in Italian coastal waters.