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).
journal_name
Chemospherejournal_title
Chemosphereauthors
Herrera López S,Lozano A,Sosa A,Hernando MD,Fernández-Alba ARdoi
10.1016/j.chemosphere.2016.07.008subject
Has Abstractpub_date
2016-11-01 00:00:00pages
44-53eissn
0045-6535issn
1879-1298pii
S0045-6535(16)30892-Xjournal_volume
163pub_type
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