A method is described for the analysis of binary mixtures of folpet and fenamiphos with overlapped chromatographic peaks, using the first derivative of the chromatographic detector signal in the time domain. The method was applied to determine both pesticides in drinking, sea and ground waters at ppb levels after a preconcentration step with C18 cartridges.
P. Parilla, M. M. Galera, J. L. M. Vidal and A. G. Frenich, Analyst, 1994, 119, 2231 DOI: 10.1039/AN9941902231
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