title: New procedure for the examination of the degradation of volatile organonitrogen compounds during the treatment of industrial effluents.
abstract: We present a new procedure for the determination of 32 volatile organonitrogen compounds in samples of industrial effluents with a complex matrix. The procedure, based on dispersive liquid-liquid microextraction followed by gas chromatography with nitrogen-phosphorus and mass spectrometric detection, was optimized and validated. Optimization of the extraction included the type of extraction and disperser solvent, disperser solvent volume, pH, salting out effect, extraction, and centrifugation time. The procedure based on nitrogen-phosphorus detection was found to be superior, having lower limits of detection (0.0067-2.29 μg/mL) and quantitation as well as a wider linear range. The developed procedure was applied to the determination of content of volatile organonitrogen compounds in samples of raw effluents from the production of bitumens in which 13 compounds were identified at concentrations ranging from 0.15 to 10.86 μg/mL and in samples of effluents treated by various chemical methods.
authors.affiliation: Department of Chemical and Process Engineering, Chemical Faculty, Gdansk University of Technology, Gdansk, Poland.
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Boczkaj
authors.affiliation: Department of Chemical and Process Engineering, Chemical Faculty, Gdansk University of Technology, Gdansk, Poland.
authors.forename: Patrycja
authors.initials: P
authors.lastname: Makoś
authors.affiliation: Department of Chemical and Process Engineering, Chemical Faculty, Gdansk University of Technology, Gdansk, Poland.
authors.forename: Andre
authors.initials: A
authors.lastname: Fernandes
authors.affiliation: Department of Chemistry and Biochemistry, Kettering University, Kettering Flint, MI, USA.
authors.forename: Andrzej
authors.initials: A
authors.lastname: Przyjazny
keywords: dispersive liquid-liquid microextraction; gas chromatography; postoxidative effluents; volatile organonitrogen compounds; wastewater