The Horiba Aqualog is used to characterize dissolved organic matter in environmental waters (streams, lakes, wetlands, and groundwater).
In combination with extraction techniques, the Aqualog can also allow analysis of organic matter in soils.
Fluorescent spectroscopy by Excitation Emission Matrices (EEMs) has become a common tool for probing the composition, concentration, and dynamics of OM from various source materials. EEMs are rapid and require < 7 mL of sample volume. Fluorescence spectroscopy measurements extend the capability for OM bulk characterizations of natural and managed systems. The data generated from absorbance and fluorescent measurements can be analyzed to data that can be analyzed to determine OM source origin (including parent material as well as processing mechanisms), molecular size and complexity, aromatic nature, reactivity, relative concentrations, and degree of humification. The data can be compiled to track changes in OM chemistry across watersheds on spatiotemporal scales.
The Horiba is also used as a classical fluorometer to determine excitation and emission wavelengths and intensities.