Microextraction by Packed Sorbent (MEPS): Theory, Developments and Applications
- Pp. 241-253 (13)Mohammad Mahdi Moein, Abbi Abdel-Rehim and Mohamed Abdel-Rehim
Sample preparation is a critical issue in bioanalysis since the matrix is often complex. A good sample preparation technique will remove the possible interferences from the sample matrix pre-concentrate the analyte and to be reproducible independent of the sample matrix. Recent developments of sample preparation techniques are directed toward automation, the smaller sample volumes and online coupling of sample preparation units and detection systems. Microextraction in packed syringe (MEPS) is a new type of solid-phase extraction (SPE) technique that is miniaturized and can be fully automated. In MEPS the solid bed is integrated in the injection syringe. The MEPS syringe can be used online for both extraction and injection of samples. The present chapter gives an overview of MEPS technique, including the MEPS description, formats, sorbents, experimental and protocols and factors that affect the MEPS performance. We also summarize MEPS recent applications in bioanalysis, environmental and food analysis.