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- W2549084171 abstract "Honey is an important food widely used by people around the world. It can contain agrochemical residues as a result of the use of these products in agriculture. QuEChERS method was used for the determination of seven pesticide residues (chlorothalonil, heptachlor, captan, α-endosulfan, β-endosulfan, endosulfan sulfate and dieldrin) in 25 Brazilian honey samples from different regions. Extraction was carried out through the use of 1% acetic acid-ethyl acetate solvent with MgSO4 and CH3COONa, followed by dSPE cleanup with PSA sorbent. The analyses were carried out with GC-µECD. The chromatographic signal showed good linearity with correlation coefficient ≥ 0.99 and the LOQs for the pesticides studied varied between 0.007 to 0.05 mg kg -1 . The method was validated using a blank sample of honey spiked at three fortification levels (0.07, 0.2 and 0.4 mg kg -1 ). The recoveries for the seven compounds ranged from 75% to 119%, and relative standard deviations were ≤ 26%. Five of the 25 honey samples analyzed contained pesticide residues, with a maximum concentration of 0.026 mg kg -1 for α-endosulfan. From the five contaminated samples, four were from non-agricultural areas, which indicated environmental contamination at these sites. The QuEChERS approach was successfully employed for the GC-µECD analyses of the seven studied pesticides in honey samples." @default.
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- W2549084171 date "2012-03-28" @default.
- W2549084171 modified "2023-09-23" @default.
- W2549084171 title "Quechers Approach for the Determination of Seven Pesticide Residues in Brazilian Honey Samples Using GC-µECD" @default.
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- W2549084171 doi "https://doi.org/10.17265/2159-5828/2012.03.006" @default.
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