%0 Journal Article
%T Evaluation of a simple hyphenated system for flow injection solid-phase pre-concentration and capillary electrophoresis
%A Assun£¿£¿o
%A Nilson A.
%A Miranda
%A Carlos E. S.
%A Lan£¿as
%A Fernando M.
%A Rosias
%A Maria Fernanda G. G.
%A Carrilho
%A Emanuel
%J Journal of the Brazilian Chemical Society
%D 2008
%I Sociedade Brasileira de Qu¨ªmica, SBQ
%R 10.1590/S0103-50532008000600017
%X in this work, the development and evaluation of a hyphenated flow injection-capillary electrophoresis system with on-line pre-concentration is described. preliminary tests were performed to investigate the influence of flow rates over the analytical signals. results revealed losses in terms of sensitivity of the fia-ce system when compared to the conventional ce system. to overcome signal decrease and to make the system more efficient, a lower flow rate was set and an anionic resin column was added to the flow manifold in order to pre-concentrate the analyte. the pre-concentration fia-ce system presented a sensitivity improvement of about 660% and there was only a small increase of 8% in total peak dispersion. these results have confirmed the great potential of the proposed system for many analytical tasks especially for low concentration samples.
%K instrumentation
%K automation
%K flow injection analysis
%K solid-phase extraction.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-50532008000600017&lng=en&nrm=iso&tlng=en