Spectrophotometric detection of fenthion in foods after extraction by magnetic zirconia.
Appl Opt
; 59(10): 3043-3048, 2020 Apr 01.
Article
en En
| MEDLINE
| ID: mdl-32400583
ABSTRACT
A magnetic material, Fe3O4@ZrO2, was used to enrich an organophosphorus pesticide, fenthion. After enrichment the Fe3O4@ZrO2 was treated with NaOH to elute and hydrolyze fenthion. The hydrolysis products, orthophosphate ions, combine to molybdate ions to yield molybdophosphoric acid, which was further reduced with SnCl2 to obtain a blue phosphatemolybdate. The content of orthophosphate ions as well as fenthion can be determined through the spectrophotometric method. Adsorption and elution conditions were optimized to obtain an enrichment factor of 12.5. The proposed composite method was successfully used to analyze the fenthion residues on the skin of cucumber and apple samples. The limit of detection was as low as 0.037 mg/Kg, which was close to that of the gas chromatography-mass spectrometer method. The method was simple, rapid, and economic, suitable for the rapid screen of fenthion and the other organophosphorus pesticide in mass samples.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Circonio
/
Compuestos Férricos
/
Residuos de Plaguicidas
/
Contaminación de Alimentos
/
Cucumis sativus
/
Malus
/
Fentión
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
Appl Opt
Año:
2020
Tipo del documento:
Article