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Identifier 000374928
Title Προσδιορισμός ενώσεων αρσενικού σε θάλασσια μακροάλγη από το Θερμαϊκό Κόλπο χρησιμοποιώντας υγρή χρωματογραφία με φασματομετρία μάζας επαγωγικά συζευγμένου πλάσματος
Alternative Title Determination of arsenic species in marine macroalgae from the Thermaic Gulf using chromatography with inductively coupled plasma mass spectrometry
Author Κοκκίνης, Ιωάννης Δημ.
Thesis advisor Περγαντής, Σπύρος
Select a value Universitat de Barcelona
Πανεπιστήμιο Κρήτης
Abstract The object of this study was the determination of arsenic compounds in samples of marine macroalgae from Thermaikos Gulf. Specifically, the total arsenic content was determined using inductively coupled plasma mass spectrometry (ICP/MS) after microwave digestion. The determination of arsenic compounds was made through the coupling of liquid chromatography and ICP/MS, after the extraction of samples with water. These two methods were optimized and successfully used to analyze the same kind of samples in the past. The content of total arsenic in samples of macroalgae was found to be lower than that reported in studies of the same or similar samples from the Mediterranean region. It is shown, as in previous studies, that there is a tendency of algae to accumulate a larger quantity of arsenic in the winter. According to the results, a significant effect of the sea current in the transport of arsenic along the Thermaikos Gulf is suggested. Arseno-sugars, the characteristic compounds of arsenic in marine algae, were found in all samples. Also, inorganic arsenic was detected in thirteen samples and it was the largest fraction of the total content of arsenic in both types of the algae Cystoseira. Finally, low extraction efficiencies in some samples are mainly attributed to the physical condition of the samples and difficulties encountered during the pre-processing.
Language Greek
Subject Αρσενικό
Issue date 2012-05-04
Collection   Faculty/Department--Faculty of Sciences and Engineering--Department of Chemistry--Post-graduate theses
  Type of Work--Post-graduate theses
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