engleski

Surface Active Substances in the Eastern Mediterranean

During the EGAMES expedition in the Eastern Mediterranean in July 1993 surface active substances (SAS) were determined in seawater samples from Ionian and Aegean Seas using a.c. voltammetry. Measurements were made on unfiltered samples on board of the excursion ship and concentrations of SAS were estimated using a calibration graph prepared with an arbitrary standard surfactant, Triton-X-100. The concentrations of SAS in the Aegean Sea ranged from 0.07 to 0.21 mg/l in surface waters (0.5 m) and from 0.07 to 0.35 mg/l at 5 m depth. In the Ionean Sea samples were collected only at 0.5 m depth and the concentrations of SAS were from 0.08 to 0.18 mg/l. Qualit! atively, more hydrophobic organic material was present in the Aegean Sea, while in the more turbulent waters of the Eastern Mediterranean and in the open waters of the Ionian Sea more hydrophilic and/or conditionally hydrophobic substances were present.

surface active substances

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