Liquid chromatography-tandem mass spectrometry determination of synthetic cathinones and phenethylamines in influent wastewater of eight European cities
A sensitive UHPLC-MS/MS method for the determination of ten NPS in wastewater. In-sample stability was investigated at different pH and temperatures. Matrix effects were accounted for using isotopically-labelled internal standards. The fully validated methodology was applied to wastewater samples from around Europe.