Determination of imidacloprid in vegetables by high-performance liquid chromatography with diode-array detection.
An HPLC method is described for the determination of imidacloprid residues in vegetables at levels ranging from 0.01 to 0.60 mg/kg. The selection of the extraction and clean-up procedure is discussed. Spectral data obtained with diode-array detection allow the identification of imidacloprid residues. Thermospray mass spectrometric studies were carried out in combination with HPLC. The mean recoveries and standard deviations were 95% and 4.7%, respectively, in the various crops tested. Registration of the analytical results for a control sample in quality control charts demonstrated the performance of the method. Data for incurred residues of imidacloprid in vegetable samples routinely applying the proposed method are also presented.
Fernandez-Alba
A R
AR
Pesticide Residues Research Group, Facultad de Ciencias de Almería, Universidad de Almeria, Spain.
Valverde
A
A
Agüera
A
A
Contreras
M
M
Chiron
S
S
D002851:Chromatography, High Pressure Liquid / Q000379:methods* / Q000706:statistics & numerical data; D005506:Food Contamination; D007093:Imidazoles / Q000032:analysis*; D007306:Insecticides / Q000032:analysis*; D013058:Mass Spectrometry; D000073943:Neonicotinoids; D009574:Nitro Compounds; D010573:Pesticide Residues / Q000032:analysis*; D011786:Quality Control; D015203:Reproducibility of Results; D014675:Vegetables / Q000737:chemistry*
D007093:Imidazoles; D007306:Insecticides; D000073943:Neonicotinoids; D009574:Nitro Compounds; D010573:Pesticide Residues; C082359:imidacloprid