Excitation-Dependent Fluorescence Quantum Yield for Freshwater Chromophoric Dissolved Organic Matter from Northern Russian Lakes

Figure 5

RP-HPLC chromatograms of CDOM from the Verhnee (a) and Onego (b) lakes with online fluorescence detection at excitation/emission wavelength pairs 270/450 nm (red lines) and 270/350 nm (blue lines) for detection of humic-like and protein-like fluorescence, respectively. Inset zoom shows the zone of chromatograms from 3.5 to 8.5 min. Normalized emission spectra of the peaks #1–6 of fractionated CDOM from the Verhnee (c) and Onego (d) lakes. The CDOM from the Vodoprovodnoe lake demonstrated similar chromatograms and emission spectra with that of the Verhnee lake.

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