title: Comparison of humic substances isolated from thermal water and surface water by electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry.
abstract: Characterization of humic substances isolated from thermal water and surface water was carried out by elemental analysis and electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry. Atomic ratios derived from elemental analysis represented compositional differences of humic substances. Hydrogen-to-carbon and oxygen-to-carbon atomic ratios were also calculated from molecular formulae determined by ultra high-resolution mass spectrometry. The van Krevelen diagram was used to illustrate the bias between the atomic ratios from elemental analysis and mass spectrometry.
authors.forename: K
authors.initials: K
authors.lastname: Kovács
authors.forename: A
authors.initials: A
authors.lastname: Gáspár
authors.forename: Cs
authors.initials: C
authors.lastname: Sajgó
authors.forename: Ph
authors.initials: P
authors.lastname: Schmitt-Kopplin
authors.forename: E
authors.initials: E
authors.lastname: Tombácz
mesh_terms: D001578:Benzopyrans / Q000032:analysis / Q000737:chemistry; D005583:Fourier Analysis; D045482:Hot Springs / Q000737:chemistry*; D006812:Humic Substances / Q000032:analysis*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D001578:Benzopyrans; D006812:Humic Substances; C005023:fulvic acid