Sensitive method for the determination of organophosphorus pesticides in fruits and surface waters by high-performance liquid chromatography with ultraviolet detection.
A sensitive method for the high-performance liquid chromatographic determination of five organophosphorus pesticides (paraoxon, methyl-parathion, ethyl-parathion, guthion and fenitrothion) in fruits and tap and river water samples is described. For the determination of pesticides in fruits a simple and rapid sample preparation procedure was developed that allowed pesticides to be determined at 50-100 micrograms/kg levels with recoveries ranging from 83 to 118% and relative standard deviations below 6%. The determination of pesticide residues in surface water samples was also successfully accomplished. Concentrations at sub-ppb levels can be measured by using a solid-phase concentration step, the recoveries being over 80%. In analyses of both fruits and surface waters, the sensitivity levels achieved were 2-10 times lower than legal limits admitted in the European Economic Community.
Carabias Martinez
R
R
Departamento de Química Analítica, Nutrición y Bromatología, Universidad de Salamanca, Spain.
Rodriguez Gonzalo
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E
Amigo Moran
M J
MJ
Hernandez Mendez
J
J
D002851:Chromatography, High Pressure Liquid; D005638:Fruit / Q000737:chemistry*; D007202:Indicators and Reagents; D007306:Insecticides / Q000032:analysis*; D009943:Organophosphorus Compounds; D013056:Spectrophotometry, Ultraviolet; D014874:Water Pollutants, Chemical / Q000032:analysis; D014881:Water Supply / Q000032:analysis*
D007202:Indicators and Reagents; D007306:Insecticides; D009943:Organophosphorus Compounds; D014874:Water Pollutants, Chemical