Journal
FOOD CHEMISTRY
Volume 127, Issue 2, Pages 855-865Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2011.01.024
Keywords
Pesticides; Multi-residue analysis; Berry fruits; SPE; GC-MS; Validation
Funding
- Chinese Ministry of education [Z2005-1-23001]
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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 R-2 >= 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. (C) 2011 Elsevier Ltd. All rights reserved.
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