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Liquid phase microextraction associated with flow injection systems for the spectrometric determination of trace elements
- Lemos, Valfredo Azevedo, Oliveira, Rafael Vasconcelos, Lopes dos Santos, Walter Nei, Menezes, Rebeca Moraes, Santos, Luana Bastos, Costa Ferreira, Sérgio Luís
- Trends in analytical chemistry 2019 v.110 pp. 357-366
- liquid-phase microextraction, solvents, trace elements
- Liquid phase microextraction (LPME) has been widely used in extraction and preconcentration systems as an excellent alternative to conventional liquid phase extraction. In this work, a critical review is presented on LPME-based flow injection preconcentration systems. LPME techniques are classified into three main groups: single drop liquid phase microextraction (SDME), hollow fiber liquid phase microextraction (HF-LPME) and dispersive liquid-liquid microextraction (DLLME). Flow injection systems involving these techniques are described and evaluated, addressing aspects related to advantages, disadvantages, components, solvents, samples, and trends.