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Publication
Residue analysis of insecticides in potatoes by QuEChERS-dSPE/UHPLC-PDA
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Advisor(s)
Abstract(s)
Insecticides are broadly applied in agriculture to defend crops from illnesses and pest attacks,
consequently guaranteeing high production. However, their residual deposits in food products
are becoming a main concern with regard to human consumption. As such, sensitive analytical
methods should be developed to assess, prevent and control insecticide residues. In this research,
an accurate, fast and reliable residual analytical method, that is quick, easy, cheap, effective,
rugged and safe, combined with dispersive solid phase extraction (QuEChERS-dSPE), was developed
for the determination of the most common insecticides used in potatoes cultivation (chlorpyrifos,
λ-cyhalothrin, deltamethrin and acrinathrin), using an ultra-high performance chromatography
photodiode array detector (UHPLC-PDA). The most influential extraction and instrumentation
parameters that affect the method’s performance, such as extraction solvent, ratio salts, sorbents,
stationary phases, gradient conditions and eluents, were assessed. Under the ideal conditions,
good linearity (0.992–0.998), limits of detection (0.02–0.47 µg/kg) and quantification (0.06–1.58 µg/kg),
recovery (94.1 to 112%) and precision (relative standard deviation <18%) were achieved for spiked
levels between 2.5 and 50 µg/kg. The obtained results revealed that the potatoes analyzed do not
represent any concern for human healthy, as the insecticide residues detected were lower than the
maximum residue limits set by the European Union, Codex Alimentarius, and other organizations.
Description
Keywords
Insecticides Potatoes Full factorial design QuEChERS-dSPE UHPLC-PDA . Faculdade de Ciências Exatas e da Engenharia Centro de Química da Madeira
Citation
Reis, D., Silva, P., Perestrelo, R., & Câmara, J. S. (2020). Residue analysis of insecticides in potatoes by QuEChERS-dSPE/UHPLC-PDA. Foods, 9(8), 1000. https://doi.org/10.3390/foods9081000
Publisher
MDPI