Determinació de compostos aromàtics sulfonats en aigües per electroforesi capil·lar.

Identifier:  TDX:812

Handle: https://hdl.handle.net/20.500.11797/TDX812

Authors:  Cugat Tomàs, Maria Josep

Abstract:
Aromatic sulfonates such as benzenesulfonates and naphthalenesulfonates are widely used in a variety of industrial processes.They are highly soluble in water and they only have a slight tendency to adsorb on organic material. So, they are very mobile in the aquatic environment. The microbiological persistence of some BZS and NSs presents an ecotoxicological risk in natural waters.Capillary electrophoresis (CE) is increasingly used for determining benzenesulfonates and naphthalenesulfonates. Because of this, two modes of CE, capillary zone electrophoresis (CZE) and micellar electrokinetic chromatography (MEKC), were investigated for the separation of these compounds. CE has two major limitations: the sample injection volume is low and the optical path-length for on-capillary UV detection is short. So, they were developed two methods using on-line preconcentration techniques: it was used a stacking procedure (LVSS) and a single-capillary configuration for performing an isotachophoretic procedure. A CZE-ESI-MS method was optimised in order to overcoming the ambiguous identification of these analytes when they are analysed by CE. It enabled aromatic sulfonates to be identified and quantified in water samples.