Despite the fact that an occurrence of UV-stabilisers of the 2(2H-1,2,3-Benzotriazol-2-yl)-phenol-type (BUVs) in environmental samples was described in 1978 for the first time, a significant rise of the publication frequency about these plastic additives has been seen the last decade. For this PhD-thesis, quantification was focused on GC–MS and solid samples in order to maximise the detection frequency among samples. Major techniques were matrix solid phase dispersion (MSPD) and an ultra-sonic extraction (USE) based procedure. Also, the suitability of microplastic-separation was investigated for reducing matrix-load of samples to be analysed for BUVs.The processed environmental samples showed total-BUV-contents of up to 843 ng•g-1 (effluent exit of wastewater treatment plant in Bitterfeld-Wolfen). Hot-spots of BUV-contamination could be localised by plotting of the corresponding sampling sites downstream of the river Saale.