[Determination of 41 pesticides in vegetables and fruits by GPC-GC-MS/MS].
Wei Sheng Yan Jiu
; 45(1): 68-75, 2016 Jan.
Article
en Zh
| MEDLINE
| ID: mdl-26987200
OBJECTIVE: A method for the determination of 41 pesticides including 26 organophosphorus pesticides, 6 kinds of carbamate, 7 pryethoids insecticides, 1 kinds of organochlorine and fungicide in vegetables and fruits, was established based on optimized QuEChERS with on line gel permeation chromatography-gas chromatography-mass spectrometry (GPC-GC-MS/MS). METHODS: The method obtained the optimized conditions by comparing different methods of extraction and purification. The analytes were extracted from the samples using acetonitrile-buffer of acetic acid and sodium acetate. Then the extracts were determined by GC-MS/MS in multireaction monitoring (MRM) mode after being cleaned up with mixed solid-phase dispersion. And the external standard method was applied to quantify. RESULTS: All the 41 pesticides had good linearity in the ranges of 2-200 ng/mL with the correlation coefficients higher than 0.995. The average recoveries of the most of 41 pesticides in celery and apple were in the range of 71.0%-125.4% at the spiked levels of 5, 10 and 50 µg/kg,with relative standard deviations (RSDs) of 0.34%-15.0%. The limits of quantification (LOQs) of the method at the spiked levels of 5 µg/kg were 0.107-10.100 µg/kg. CONCLUSION: The method is simple, rapid, sensitive and specific.
Buscar en Google
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Verduras
/
Residuos de Plaguicidas
/
Contaminación de Alimentos
/
Frutas
/
Cromatografía de Gases y Espectrometría de Masas
Idioma:
Zh
Revista:
Wei Sheng Yan Jiu
Asunto de la revista:
SAUDE PUBLICA
Año:
2016
Tipo del documento:
Article
Pais de publicación:
China