Four-way modeling of 4.2 K time-resolved excitation emission fluorescence data for the quantitation of polycyclic aromatic hydrocarbons in soil samples

GOICOECHEA, HÉCTOR; S YU,; MOORE; A CAMPIGLIA,

TALANTA

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2012 vol. 101 p. 330 - 336

0039-9140

A screeningmethodforthesoilanalysisof15EnvironmentalProtectionAgency-polycyclicaromatichydrocarbons(EPA-PAHs)isreported.Thenewmethodisbasedonthecollectionof4.2Kfluorescencetime-resolvedexcitation?emissioncubes(TREECs)vialaser-excitedtime-resolvedShpol?skiispectro-scopy.4.2KfluorescenceTREECsresultfromthesuperpositionoffluorescencetime-resolvedexcitationemissionmatricesrecordedatdifferenttimewindowsfromthelaserexcitationpulse.Potentialinterferencefromunknownsampleconcomitantsishandledbyprocessingthefour-way4.2KfluorescenceTREECdataarrayswitheitherparallelfactoranalysis(PARAFAC)orunfoldedpartialleast-squares/residual-trilinearization(U-PLS/RTL).Thesensitivityofthetwoapproachesmakespossi-ble todeterminePAHsatthengg1 to pgg1 concentrationlevelwithnoneedforsamplepre-concentration.Itsselectivityeliminatessampleclean-upstepsandchromatographicseparation.ThesefeaturesreducePAHloss,analysistimeandcost.Themethodisenvironmentallyfriendlyasthecompletescreeningofthe15EPA-PAHstakesonly250 mL oforganicsolventpersample.