Iancu, VasileVasileIancuPetre, JanaJanaPetrePopescu, MarianaMarianaPopescuRadu, Gabriel LucianGabriel LucianRadu2018-11-122018-11-122018L:1843-5831 (online); 2457-8371; http://doi.org/10.21698/simi.2018.ab37http://hdl.handle.net/123456789/1333International Symposium "The Environment and the Industry", 20-21 September, 2018, Bucharest, Romania, pp. 92-93en-USLiquid chromatography-mass spectrometryParabensSludgeUltrasonic extractionNew chromatographic method for determination of para-hydroxy-benzoic acid esters from sewage sludgeConference abstract