Analysis of aquatic-phase natural organic matter by optimized LDI-MS method
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Environmental Science and Engineering Program
Water Desalination and Reuse Research Center (WDRC)
Permanent link to this recordhttp://hdl.handle.net/10754/563353
MetadataShow full item record
AbstractThe composition and physiochemical properties of aquatic-phase natural organic matter (NOM) are most important problems for both environmental studies and water industry. Laser desorption/ionization (LDI) mass spectrometry facilitated successful examinations of NOM, as humic and fulvic acids in NOM are readily ionized by the nitrogen laser. In this study, hydrophobic NOMs (HPO NOMs) from river, reservoir and waste water were characterized by this technique. The effect of analytical variables like concentration, solvent composition and laser energy was investigated. The exact masses of small molecular NOM moieties in the range of 200-1200 m/z were determined in reflectron mode. In addition, spectra of post-source-decay experiments in this range showed that some compounds from different natural NOMs had the same fragmental ions. In the large mass range of 1200-15 000 Da, macromolecules and their aggregates were found in HPO NOMs from natural waters. Highly humic HPO exhibited mass peaks larger than 8000 Da. On the other hand, the waste water and reservoir water mainly had relatively smaller molecules of about 2000 Da. The LDI-MS measurements indicated that highly humic river waters were able to form large aggregates and membrane foulants, while the HPO NOMs from waste water and reservoir water were unlikely to form large aggregates. Copyright © 2014 John Wiley & Sons, Ltd.
JournalJournal of Mass Spectrometry
- Fluorescence technique for the characterization of natural organic matter in river water.
- Authors: Ahmad UK, Ulang Z, Yusop Z, Fong TL
- Issue date: 2002
- Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) coupled to XAD fractionation: Method to algal organic matter characterization.
- Authors: Nicolau R, Leloup M, Lachassagne D, Pinault E, Feuillade-Cathalifaud G
- Issue date: 2015 May
- Carbon isotope composition of dissolved humic and fulvic acids in the Tokachi River system.
- Authors: Nagao S, Kodama H, Aramaki T, Fujitake N, Uchida M, Shibata Y
- Issue date: 2011 Jul
- Characterization of humic substances by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry.
- Authors: Mugo SM, Bottaro CS
- Issue date: 2004
- Low molecular weight components in an aquatic humic substance as characterized by membrane dialysis and orbitrap mass spectrometry.
- Authors: Remucal CK, Cory RM, Sander M, McNeill K
- Issue date: 2012 Sep 4