Simultaneous sonication-assisted extraction, and determination by gas chromatography–mass spectrometry, of di-(2-ethylhexyl)phthalate, nonylphenol, nonylphenol ethoxylates and polychlorinated biphenyls in sludge from wastewater treatment plants
Keywords: Sonication-assisted extraction; Di-(2-ethylhexyl)phtalate; Nonylphenol; Nonylphenol ethoxylates; Polychlorinated biphenyls; Sludge; Gas chromatography–mass spectrometry