Evaluation of a simple hyphenated system for flow injection solid-phase pre-concentration and capillary electrophoresis

Journal of the Brazilian Chemical Society

Lanças, Fernando M.¹  Universidade de Ribeirão Preto, Ribeirão Preto, Brazil¹  Universidade de São Paulo, São Carlos, Brazil¹  Universidade de São Paulo, Piracicaba, Brazil¹  Miranda, Carlos E. S.¹  Rosias, Maria Fernanda G. G.¹  Assunção, Nilson A.¹  Carrilho, Emanuel¹ 

关键词: instrumentation;    automation;    flow injection analysis;    solid-phase extraction;   

DOI  :  10.1590/S0103-50532008000600017

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

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.

【 授权许可】

Unknown