PMID: 16646458May 2, 2006Paper

Sorption of Aldrich humic acid onto hematite: insights into fractionation phenomena by electrospray ionization with quadrupole time-of-flight mass spectrometry

Environmental Science & Technology
P ReillerC Moulin

Abstract

Sorption induced fractionation of purified Aldrich humic acid (PAHA) on hematite is studied through the modification of electrospray ionization (ESI) quadrupole time-of-flight (QToF) mass spectra of supernatants from retention experiments. The ESI mass spectra show an increase of the "mean molecular masses" of the molecules that constitutes humic aggregates. The low molecular weight fraction (LMWF; m/z < or = 600 Da) is preferentially sorbed compared to two other fractions. The resolution provided by ESI-QToF mass spectrometer in the low-mass range provided evidence of further fractionation induced by sorption within the LMWF. Among the two latter fractions, the high molecular weight fraction (HMWF; m/z approximately 1700 Da) seems to be more prone to sorption compared to the intermediate molecular weight fraction (IMWF; m/z approximately 900 Da). The IMWF seems to be more hydrophilic as it should be richer in O, N, and alkyl C from the proportion of even mass, and poorer in aromatic structures from mass defect analysis in ESI mass spectra.

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Citations

Dec 14, 2011·Water Research·Noémie JanotMarc F Benedetti
Aug 29, 2009·Journal of Contaminant Hydrology·Holger Lippold, Johanna Lippmann-Pipke
Mar 12, 2015·Environmental Toxicology and Chemistry·Kelsey M DannerG Allen Burton
Jan 20, 2015·Journal of Environmental Sciences (China)·Kai FangYuzhou Wang
Jan 3, 2007·Journal of Mass Spectrometry : JMS
Feb 6, 2009·Environmental Science & Technology·Francis ClaretPascal E Reiller
Aug 12, 2010·Environmental Science & Technology·Noémie JanotMarc F Benedetti
Jan 30, 2007·Environmental Science & Technology·Liping WengTjisse Hiemstra
Apr 7, 2007·Environmental Science & Technology·Iso Christl, Ruben Kretzschmar
Jul 28, 2009·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Julien BrevetPascal E Reiller
Dec 22, 2009·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Pascal E Reiller, Julien Brevet
Jan 19, 2011·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Pascal E ReillerAlessandro Piccolo

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