Abstract
A method using solid phase extraction (SPE) cleanup followed by gas chromatography-mass spectrometry (GC-MS) has been established for quantitative determination of 88 pesticide residues in berry fruits including raspberry, strawberry, blueberry and grape. Based on an appraisal of the characteristics of GC-MS, validation experiments were conducted for 88 pesticides. In the method, solid-phase extraction was carried out using Envi-Carb cartridge coupled with NH2-LC cartridge with acetonitrile-toluene (3:1, v/v) as the eluted solvent. In the linear range of each pesticide, the correlation coefficient was R2 ≥ 0.99. At the low, medium and high three fortification levels of 0.05-0.5 mg kg-1, recoveries fell within 63-137%. The relative standard deviation was between 1% and 19% for all 88 pesticides. Low limits of detection (0.006-0.05 mg kg-1) and quantification (0.02-0.15 mg kg-1) were readily achieved with this method for all tested pesticides.
| Original language | English |
|---|---|
| Pages (from-to) | 855-865 |
| Number of pages | 11 |
| Journal | Food Chemistry |
| Volume | 127 |
| Issue number | 2 |
| DOIs | |
| State | Published - 15 Jul 2011 |
Keywords
- Berry fruits
- GC-MS
- Multi-residue analysis
- Pesticides
- SPE
- Validation
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