{
  "date" : "1997-05-01",
  "identifier_doecontract" : "",
  "subject" : "40 CHEMISTRY; HUMIC ACIDS; FULVIC ACIDS; ION CYCLOTRON RESONANCE SPECTROSCOPY; MASS SPECTRA; FOURIER TRANSFORMATION; MOLECULAR WEIGHT; STRUCTURAL CHEMICAL ANALYSIS",
  "description" : "High-field (9.4 T) Fourier transform ion cyclotron resonance (FT-ICR) mass spectra of standard Suwannee River humic and fulvic acids have been obtained by use of laser desorption (LDI) and electrospray (ESI) ionization. The LDI-FT-ICR mass spectrum was similar to those observed previously, with ions at essentially every nominal value, 200 {lt} m/z {lt} 800. In contrast, the ESI FT-ICR mass spectrum, although still containing ions at most values in the 200 {le} m/z {le} 800 range, was dominated by relatively few prominent species. ESI FT-ICT mass spectra of standard humic and fulvic acid isolates were similar. Although many ionic species appeared in both fulvic acid and humic acid ESI FT-ICR mass spectra, the fulvic acid mass spectrum contain more highly charged species. Subfractions of the fulvic acid isolated by an HPLC procedure yielded similar mass spectra. The stability of high-mass ions produced by ESI combined with the high-mass resolution capability of FT-ICR MS allow for precise determination of molecular masses, from which molecular formulas may be obtained by mass alone. Future two-dimensional FT-ICR MS{sup 2} determinations of humic and fulvic acid structures should be feasible by use of collisionally induced and multiple-photon dissociation techniques. 34 refs., 9 figs., 3 tabs.",
  "language" : "English",
  "identifier_report" : "CONF-960807-",
  "publisher_sponsor" : "",
  "publisher_country" : "United States",
  "source" : "CLA; SCA: 400201; 400102; PA: CLA-97:080659; EDB-97:099617; SN: 97001813047",
  "purl" : "",
  "title" : "High-resolution Fourier transform ion cyclotron resonance mass spectrometry of humic and fulvic acids by laser desorption/ionization and electrospray ionization",
  "type" : "Journal Article",
  "subject_related" : "",
  "relation" : "Journal Name: Energy and Fuels; Journal Volume: 11; Journal Issue: 3; Conference: 212. national meeting of the American Chemical Society (ACS), Orlando, FL (United States), 25-30 Aug 1996; Other Information: PBD: May-Jun 1997",
  "entry_date" : "2010-12-29",
  "subject_list" : [ "40 CHEMISTRY", "HUMIC ACIDS", "FULVIC ACIDS", "ION CYCLOTRON RESONANCE SPECTROSCOPY", "MASS SPECTRA", "FOURIER TRANSFORMATION", "MOLECULAR WEIGHT", "STRUCTURAL CHEMICAL ANALYSIS" ],
  "publisher_availability" : "",
  "rights" : "",
  "announced_date" : "1997-08-04",
  "type_qualifier" : "",
  "has_fulltext" : false,
  "coverage" : "",
  "identifier" : "",
  "journal_volume" : "11",
  "creator" : "Fievre, A; Solouki, T; Marshall, A G; Cooper, W T [Florida State University, Tallahassee, FL (United States). Dept. of Chemistry]",
  "site_ownership_code" : "CLA",
  "osti_id" : "496279",
  "journal_issue" : "3",
  "resource_type" : "JOUR",
  "format" : "Medium: X; Size: pp. 554-560",
  "journal_name" : [ ],
  "contributing_organizations" : "",
  "citation_location" : "https://www.osti.gov/etdeweb/biblio/496279",
  "publication_year" : 1997,
  "subject_list_commas" : "40 CHEMISTRY, HUMIC ACIDS, FULVIC ACIDS, ION CYCLOTRON RESONANCE SPECTROSCOPY, MASS SPECTRA, FOURIER TRANSFORMATION, MOLECULAR WEIGHT, STRUCTURAL CHEMICAL ANALYSIS",
  "publisher" : "",
  "identifier_other" : "Journal ID: ENFUEM; ISSN 0887-0624; TRN: 970800659",
  "publisher_research" : "",
  "creators_list" : [ "Fievre, A", "Solouki, T", "Marshall, A G", "Cooper, W T [Florida State University, Tallahassee, FL (United States). Dept. of Chemistry]" ],
  "doi" : "https://doi.org/10.1021/ef970005q"
}