Dispersive microextraction based on water-coated Fe3O4 followed by gas chromatography-mass spectrometry for determination of 3-monochloropropane-1,2-diol in edible oils.
J Chromatogr A
; 1240: 45-51, 2012 Jun 01.
Article
in En
| MEDLINE
| ID: mdl-22520640
ABSTRACT
In the present work, we developed a novel dispersive microextraction technique by combining the advantages of liquid-phase microextraction (LPME) and magnetic solid-phase extraction (MSPE). In this method, trace amount of water directly absorbed on bare Fe3O4 to form water-coated Fe3O4 (W-Fe3O4) and rapid extraction can be achieved while W-Fe3O4 dispersed in the sample solution. The analyte adsorbed W-Fe3O4 can be easily collected and isolated from sample solution by application of a magnet. It was worth noting that in the proposed method water was used as extractant and Fe3O4 served as the supporter and retriever of water. The performance of the method was evaluated by extraction of 3-monochloropropane-1,2-diol (3-MCPD) from edible oils. The extracted 3-MCPD was then derived by a silylanization reagent (1-trimethylsilylimidazole) before gas chromatography-mass spectrometry (GC-MS) analysis. Several parameters that affected the extraction and derivatization efficiency were investigated. Our results showed that the limit of detection for 3-MCPD was 1.1 ng/g. The recoveries in spiked oil samples were in the range of 70.0-104.9% with the RSDs less than 5.6% (intra-day) and 6.4% (inter-day). Taken together, the simple, rapid and cost-effective method developed in current study, offers a potential application for the extraction and preconcentration of hydrophilic analytes from complex fatty samples.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Dietary Fats, Unsaturated
/
Ferrosoferric Oxide
/
Solid Phase Microextraction
/
Fats, Unsaturated
/
Glycerol
/
Gas Chromatography-Mass Spectrometry
Type of study:
Prognostic_studies
Language:
En
Journal:
J Chromatogr A
Year:
2012
Document type:
Article
Affiliation country:
China
Publication country:
HOLANDA
/
HOLLAND
/
NETHERLANDS
/
NL
/
PAISES BAJOS
/
THE NETHERLANDS