Chemosphere. 2016 Aug 11;163:44-53. doi: 10.1016/j.chemosphere.2016.07.008. [Epub ahead of print]
- 1European Union Reference Laboratory for Pesticide Residues in Fruits and Vegetables, University of Almeria, Agrifood Campus of International Excellence (ceiA3), 04120, Almería, Spain.
- 2National Agricultural Technology Institute (INTA), Concordia Agricultural Experimental Station, Argentina.
- 3National Institute for Agricultural and Food Research and Technology (INIA), 28040, Madrid, Spain.
- 4European Union Reference Laboratory for Pesticide Residues in Fruits and Vegetables, University of Almeria, Agrifood Campus of International Excellence (ceiA3), 04120, Almería, Spain. Electronic address: amadeo@ual.es.
Abstract
A
developed multi-residue method using microflow-LC-ESI-QqQ-MS provided a
wide-scope analysis for medium-polar and polar pesticide residues (120
compounds including breakdown products). Honeybee wax comb samples were
extracted using a generic QuEChERS based procedure. Acceptable
recoveries at concentration levels of 5 and 50 μg kg-1 were within the 70-120% range with an associated precision RSD <20%. The LOQ values were mostly 5 μg kg-1
for almost all pesticides. Aprox. 31 of 120 LC-amenable pesticides
tested (25.8%) were detected in a pilot study of 60 samples. Pesticide
residues detected using the proposed method were: the breakdown products
of amitraz, DMPF and DMF, an acaricide used for Varroa mite control,
with a range of concentration from 5 to 464 μg kg-1 (sum of DMPF + DMF), organophosphate insecticides from 1 to 464 μg kg-1, acaricides at concentrations > 9 μg kg-1; fungicides at concentrations ranging from 1 to 23 μg kg-1.
The number of positive detections due to herbicides was lower as
expected and at a lower level of concentration, from 1 to 5.9 μg kg-1.
Copyright © 2016 Elsevier Ltd. All rights reserved.
KEYWORDS:
Honeybee wax comb; LC-Amenable compounds; Microflow-LC-MS/MS; Pesticide residues; Trace analysis
- [PubMed - as supplied by publisher]
