Your browser does not support JavaScript!

Home    Ανάπτυξη μεθόδων φασματομετρίας μάζας επαγωγικά συζευγμένου πλάσματος για τον προσδιορισμό ενώσεων αρσενικού σε περιβαλλοντικά υδατικά δείγματα  

Results - Details

Add to Basket
[Add to Basket]
Identifier 000285026
Title Ανάπτυξη μεθόδων φασματομετρίας μάζας επαγωγικά συζευγμένου πλάσματος για τον προσδιορισμό ενώσεων αρσενικού σε περιβαλλοντικά υδατικά δείγματα
Alternative Title Development of inductively coupled plasma mass spectrometry methods for the determination of arsenic in environmental water samples
Author Κουρομιχελάκη, Μαριάννα
Thesis advisor Περγαντής, Σπυρίδων
Abstract The present study refers to the development of Inductively Coupled Plasma Mass Spectrometry Methods (ICP-MS), in order to determine arsenic in aquatic environmental samples. The study includes both the total determination and the speciation analysis of arsenic (arsenite (iAs(III)), arsenate (iAs(V)), dimethylarsinic acid (DMA), monomethylarsonic acid (MMA)) in aquatic environmental samples. Seawater comprises a complex matrix for analysis by ICP-MS due to its chloride content. A hydride generation (HG) system was used so that the chloride interference (40Ar35Cl+, m/z 75) could be eliminated. Particularly, HG-ICP-MS and HPLC-HG-ICP-MS methods were used. In addition to the conventional pneumatic nebulisation HG-ICP-MS and HPLC-pneumatic nebulisation-ICP-MS methods, HG-ICP-MS and HPLC-HG-ICP-MS were used. The chloride interference was successfully eliminated by using HG-ICP-MS and HPLC-HG-ICP-MS methods. These methods were developed and optimized so that high sensitivity and low detection limits (μg L-1) would be achieved. Moreover, these methods were used to determine the arsenic content of seawater, rainwater, drinking water samples, as well as water samples collected from treatment plant of Heraklion. The sample analysis suggested that there was agreement between the measured concentration and the literature for unpolluted areas. An increase in arsenic concentration was observed for seawater samples collected in Lavrio (Attiki). Additionally, we came to a conclusion that arsenic is a conservative element since its concentration is constant to various depths. The speciation analysis proved that the most dominant form of arsenic is the pentavalent inorganic form (iAs(V)) and that organic species are less abundant than the inorganic. Moreover, the reliability of the two methods (HG-ICP-MS and HPLC-HG-ICP-MS) was proved by the existence of the arsenic mass balance
Language Greek
Issue date 2006-07-01
Collection   School/Department--School of Sciences and Engineering--Department of Chemistry--Post-graduate theses
  Type of Work--Post-graduate theses
Views 189

Digital Documents
No preview available

Download document
View document
Views : 23