title: Application of multi-way models to the time-resolved fluorescence of polycyclic aromatic hydrocarbons mixtures in water.
abstract: The time-resolved laser-induced fluorescence of a series of polycyclic aromatic compounds (PAHs) and mixtures of these latter in aqueous solution was measured by means of an apparatus equipped with optical fibers, which allows their real time in situ monitoring. The potential of such spectroscopic technique, yielding 4-way fluorescence data arrays, together with the application of multi-way models to the matricized data, was tested for the resolution of complex aqueous mixtures containing low concentrations of PAHs, as typical fluorescent pollutants in aquatic systems. PARAllel FACtors analysis was employed for the qualitative resolution of PAHs mixtures and for calculating the fluorescence lifetimes of single PAHs; n-way partial least squares analysis was applied for evaluating the concentration of the single PAHs in the aqueous mixtures.
authors.affiliation: Dipartimento di Chimica Fisica ed Elettrochimica, Università di Milano, Via Golgi 19, I-20133 Milan, Italy. elena.selli@unimi.it
authors.forename: Elena
authors.initials: E
authors.lastname: Selli
authors.forename: Cristina
authors.initials: C
authors.lastname: Zaccaria
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Sena
authors.forename: Giorgio
authors.initials: G
authors.lastname: Tomasi
authors.forename: Giovanni
authors.initials: G
authors.lastname: Bidoglio
mesh_terms: D004784:Environmental Monitoring; D016018:Least-Squares Analysis; D008956:Models, Chemical; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D013050:Spectrometry, Fluorescence / Q000295:instrumentation / Q000379:methods; D013997:Time Factors; D014867:Water / Q000737:chemistry*
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D014867:Water