| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1185255 | Food Chemistry | 2014 | 6 Pages |
•A one-step extraction–purification MSPD method for OCPs and PCBs in oils was developed.•The method was capable of analysis of low level OCPs and PCBs in edible vegetable oils.•The MSPD method was cheap, quite convenient, less time and solvent consuming.
A one-step extraction–purification multiresidue method for the determination of 14 organochlorine pesticides (OCPs) and 7 polychlorinated biphenyls (PCBs) in edible vegetable oils based on matrix solid-phase dispersion (MSPD) has been developed. The experimental parameters affecting the recoveries and the efficiency of the cleanup procedure were thoroughly evaluated. Under an optimised condition, 0.5 g of oil sample was blended with 3.5 g of sulfuric acid-impregnated silica and 0.8 g of silica gel was used as co-column absorbent. The PCBs and OCPs were eluted by 10 mL of n-hexane/dichloromethane (70:30, v/v) and determined by gas chromatography equipped with an electron capture detector (GC-ECD). Good recoveries were obtained in the range of 69.6–105.3% with relative standard deviations (RSD) values below 15% in most cases. The limits of detection (LOD), based on a signal-to-noise ratio (S/N) of 3, were in the range of 0.04–0.74 ng/g.
