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Non-target evaluation of contaminants in honey bees and pollen samples by gas chromatography time-of-flight mass spectrometry.

Chemosphere (2017-07-07)
E Hakme, A Lozano, M M Gómez-Ramos, M D Hernando, A R Fernández-Alba
ABSTRACT

This work presents a non-targeted screening approach for the detection and quantitation of contaminants in bees and pollen, collected from the same hive, by GC-EI-ToF-MS. It consists of a spectral library datasets search using a compound database followed by a manual investigation and analytical standard confirmation together with semi-quantitation purposes. Over 20% of the compounds found automatically by the library search could not be confirmed manually. This number of false positive detections was mainly a consequence of an inadequate ion ratio criterion (±30%), not considered in the automatic searching procedure. Eight compounds were detected in bees and pollen. They include insecticides/acaricides (chlorpyrifos, coumaphos, fluvalinate-tau, chlorfenvinphos, pyridaben, and propyl cresol) at a concentration range of 1-1207 μg kg

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
meso-Tetraphenylporphyrin, BioReagent, suitable for fluorescence, ≥99.0% (HPLC)
Supelco
Clomazone, PESTANAL®, analytical standard
Supelco
Cyprodinil, PESTANAL®, analytical standard
Supelco
Coumaphos, PESTANAL®, analytical standard
Supelco
Pyridaben, PESTANAL®, analytical standard
Supelco
Dimepiperate, PESTANAL®, analytical standard

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