Spectrofluorimétrie de substances humiques provenant d'eaux d'estuaire. Etat des observations avec cette méthodologie

This preliminary work on the waters of the Gironde estuary demonstrates that the humic substances can be identified by spectrofluorimetry, either in a dissolved state (direct measurement) or in a particulate state after chemical extraction. These humic substances from the Gironde estuary show fluorescence spectra typical of a terrigenous material, compared to those obtained with an indigenous marine (deep water sediments from the Orgon IV expedition).