title: Characteristic vibrational frequencies of toxic polychlorinated dibenzo-dioxins and -furans.
abstract: The possibility to monitor in real-time the emission of dioxins produced by incineration of waste or by industrial processes is nowadays a necessity considering the high toxicity of these compounds, their persistence in the environment and their ability to bio-accumulate in the food chain. Recently it has been demonstrated the potentiality of detecting dioxins in carbon tetrachloride via MIR Quantum Cascade Lasers. A fundamental step in real time monitoring of dioxins emission is the possibility to recognize the most toxic congeners within complex mixtures and at low concentrations. Taking into account the lack of spectroscopic data about these very toxic environmental pollutants and the necessity to monitor their emissions we have recorded infrared spectra of 13 of the 17 most toxic congeners of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzo-furans (PCDFs) dissolved in carbon tetrachloride. In this way we have obtained a small database that we have used to test the ability of a linear regression algorithm to recognize each congener and its relative concentration in complex mixtures of these compounds.
authors.affiliation: LENS, University of Florence, Via Nello Carrara 1, 50019 Sesto Fiorentino (FI), Italy; CNR, Istituto Nazionale di Ottica, Largo Enrico Fermi 6, 50125 Firenze, Italy. Electronic address: patrizi@lens.unifi.it.
authors.forename: Barbara
authors.initials: B
authors.lastname: Patrizi
authors.affiliation: CNR, Istituto Nazionale di Ottica, Largo Enrico Fermi 6, 50125 Firenze, Italy.
authors.forename: Mario Siciliani de
authors.initials: MS
authors.lastname: Cumis
authors.affiliation: CNR, Istituto Nazionale di Ottica, Largo Enrico Fermi 6, 50125 Firenze, Italy.
authors.forename: Silvia
authors.initials: S
authors.lastname: Viciani
authors.affiliation: CNR, Istituto Nazionale di Ottica, Largo Enrico Fermi 6, 50125 Firenze, Italy.
authors.forename: Francesco
authors.initials: F
authors.lastname: D'Amato
authors.affiliation: LENS, University of Florence, Via Nello Carrara 1, 50019 Sesto Fiorentino (FI), Italy; CNR, Istituto Nazionale di Ottica, Largo Enrico Fermi 6, 50125 Firenze, Italy; Università degli Studi di Perugia, Dipartimento di Chimica, Via Elce di Sotto 8, 06123 Perugia, Italy.
authors.forename: Paolo
authors.initials: P
authors.lastname: Foggi
mesh_terms: D000465:Algorithms; D001572:Benzofurans / Q000032:analysis* / Q000737:chemistry; D002251:Carbon Tetrachloride / Q000737:chemistry; D000072338:Dibenzofurans, Polychlorinated; D016014:Linear Models; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000032:analysis / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D014732:Vibration
chemical_list: D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D000072317:Polychlorinated Dibenzodioxins; D002251:Carbon Tetrachloride
keywords: Environmental pollutants; FT-IR spectroscopy; Polychlorinated dibenzo-dioxins; Polychlorinated dibenzo-furans