Mesoporous molecularly imprinted polymer core@shell hybrid silica nanoparticles as adsorbent in microextraction by packed sorbent for multiresidue determination of pesticides in apple juice.
Food Chem
; 345: 128745, 2021 May 30.
Article
em En
| MEDLINE
| ID: mdl-33302105
ABSTRACT
In this work, we report the synthesis of a mesoporous molecularly imprinted polymer on the surface of silica nanoparticles (core@mMIP) to be applied as adsorbent in microextraction by packed sorbent (MEPS) for selective determination of pesticides in apple juice. The core@mMIP was properly characterized, showing good adhesion of the polymer to the silica core. The best extraction conditions were 200 µL of ultrapure water as washing solvent, 150 µL of acetonitrile as eluent, 100 µL of sample at pH 2.5, five draw-eject cycles and 8 mg of adsorbent. Thereby, recoveries of 96.12 ± 1.05%, 76.88 ± 6.18% and 76.18 ± 5.57% were obtained for pyriproxyfen (PPX), deltamethrin (DTM) and etofenprox (ETF), respectively. After validation, the method presented linearity in the range of 0.02-10 µg mL-1 (r > 0.99), limit of detection of 0.005 µg mL-1, satisfactory selectivity, and proper precision and accuracy. The method was successfully applied real samples of processed and fresh apple juice.
Palavras-chave
Coreshell materials; Detlamethrin (PubChem CID: 40585); Ethylene glycol dimethacrylate (PubChem CID: 7355); Etofenprox (PubChem CID: 71245); HPLC; Methacrylic acid (PubChem CID: 4093); Microextraction by packed sorbent; Molecularly imprinted polymer; Pesticides; Pyriproxyfen (PubChem CID: 386270761); Silica; Silicon dioxide (PubChem CID: 24261)
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Resíduos de Praguicidas
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Dióxido de Silício
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Malus
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Nanopartículas
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Sucos de Frutas e Vegetais
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Análise de Alimentos
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article