Validation parameters (apparent recoveries and matrix effect) to be able to determine a group of benzothiazoles, benzotriazoles and benzenesulfonamides from environmental water including river, effluent and influent sewage samples. the method was based on solid-phase extraction using a new zwitterionic sorbent followed by liquid chromatography and high resolution mass spectrometry

%Rapp = Apparent recovery obtained at two levels of concentration in the three different samples analysed (river, effluent and influent sewage)