Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/42777
Title: SPME and SPE comparative study for coupling with microwave-assisted micellar extraction in the analysis of organochlorine pesticides residues in seaweed samples
Authors: Vega Moreno, Daura 
Sosa-Ferrera, Zoraida 
Santana Rodríguez, José Juan 
UNESCO Clasification: 2301 química analítica
Keywords: Microwave
Micellar solution
Solid-phase microextraction
Solid-phase extraction
Organochlorine pesticides
Seaweeds
Issue Date: 2007
Journal: Microchemical Journal 
Abstract: Solid-phase microextraction (SPME) and solid-phase extraction (SPE) procedures were coupling with microwave-assisted micellar extraction for organochlorine pesticides residues determination in seaweed samples. They were optimized, compared and discussed. Preliminary experiments were performed in order to study experimental conditions for the extraction of pesticides from spiked seaweed samples with microwave-assisted micellar extraction (MAME) using a non-ionic surfactant (Polyoxyethylene 10 Lauryl Ether). After that, SPME and SPE were used to clean-up and preconcentrate MAME extract prior the analysis by liquid chromatography with photodiode array (PDA) detection. Excellent results were obtained for both procedures. Average pesticide recoveries between 80.5 and 104.3% for MAME-SPME and between 73.9 and 111.5% for MAME-SPE were obtained. Relative standard deviations (RSDs) were lower than 10.3% and 5.3% respectively for all recoveries tested, and LOD between 138–348 ng g− 1 for MAME-SPME and 2–38 ng g− 1 for MAME-SPE were obtained. The method was validated using Soxhlet extraction procedure. Both methods were applied to analyse target organochlorine pesticides in several seaweed samples and results were compared. These results show the great possibilities of combining MAME-SPE-HPLC-UV for the analysis of seaweed samples, improving the selectivity and sensitivity in the determination of organochlorine pesticides analysis for this kind of samples.
URI: http://hdl.handle.net/10553/42777
ISSN: 0026-265X
DOI: 10.1016/j.microc.2007.07.002
Source: Microchemical Journal [ISSN 0026-265X], v. 87 (2), p. 139-146
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