Summary
An analytical procedure is described, which allows the simultaneous determination of 22 pesticides in drinking, ground and surface water.
In case of higher-loaded waters the sample has to be submitted to a clean-up step after CH2Cl2 extraction. The following HPLC is carried out on a Hypersil-column, 3 μm ODS by gradient elution using CH3CN-H2O (phosphate buffer, pH 7) as eluent. The detection of the single components is achieved by a diode-array detector according to their absorption maximal at 220, 230, 245 nm, the verification being supported by comparison of the absorption spectra. As the factor of enrichment is about 1000 a detection limit of 50 μg/l for any pesticide can be obtained. The recovery is higher than 90%.
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Reupert, R., Plöger, E. Bestimmung von stickstoffhaltigen Pesticiden durch Hochleistungsflüssigkeits-Chromatographie mit Diodenarray-Detektion. Z. Anal. Chem. 331, 503–509 (1988). https://doi.org/10.1007/BF00467039
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DOI: https://doi.org/10.1007/BF00467039