Determination of organophosphorus pesticides in fruits by on-line size-exclusion chromatography-liquid chromatography-gas chromatography-flame photometric detection.
The determination of organophosphorus pesticides in fruits by size-exclusion chromatography (SEC) on a polystyrene column coupled on-line to a gas chromatography (GC) system was unsatisfactory as a result of interfering peaks in GC. A liquid chromatography step on silica gel was therefore inserted between the SEC and GC steps to filter out polar by-products. Samples of fruit (apples, grapes and kiwi fruits) were extracted, then the extract filtered or centrifuged and injected into an automated on-line SEC-liquid chromatography-GC-flame photometric detection. Recoveries were about 95% and the detection limits about 1 ng/g.
De Paoli
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M
Centro Regionale per la Sperimentazione Agraria, Pozzuolo del Friuli (UD), Italy.
Barbina
M T
MT
Mondini
R
R
Pezzoni
A
A
Valentino
A
A
Grob
K
K
D002849:Chromatography, Gas / Q000379:methods*; D002850:Chromatography, Gel / Q000379:methods*; D002853:Chromatography, Liquid / Q000379:methods*; D005638:Fruit / Q000737:chemistry*; D009862:Online Systems; D009943:Organophosphorus Compounds / Q000032:analysis*; D010575:Pesticides / Q000032:analysis*; D010783:Photometry / Q000379:methods*
D009943:Organophosphorus Compounds; D010575:Pesticides