Fluorescence zone integration and its application to NOM fractions

Wen Chen, Paul Westerhoff

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Fluorescence spectroscopy was used to characterize aquatic and soil humic and fulvic acids, and to quantify metal ion complexation. Fluorescence applications for characterizing dissolved organic matter have been conducted on estuary and marine samples, surface waters, groundwater, and wastewater. A quantitative method, fluorescence zone integration (FZI), was developed to analyze excitation-emission matrix data. The effective fluorescence region was divided into five zones, i.e., Phenol and Derivatives Zone, Benzoic Acid and Derivatives Zone, Fulvic Acid Zone, Proteinaceous Compounds Zone, and Humic Acid Zone. The following rank order from highest total fluorescence to lower fluorescence was observed: Hydrophobic Neutrals > Hydrophobic Acids > Bases > Hydrophilic Acids > Hydrophilic Neutrals. Hydrophobic fractions were more fluorescent than hydrophilic fractions, and hydrophobic neutrals were most fluorescent in all isolates. The results revealed some structural information for some poor-documented fractions, such as bases and hydrophilic neutrals. This is an abstract of a paper presented at the 223rd ACS National Meting (Orlando, FL 4/7-11/2002).

Original languageEnglish (US)
Title of host publicationACS Division of Environmental Chemistry, Preprints
Number of pages5
StatePublished - 2002
Event223rd ACS National Meeting - Orlando, FL, United States
Duration: Apr 7 2002Apr 11 2002


Other223rd ACS National Meeting
Country/TerritoryUnited States
CityOrlando, FL

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Energy


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