Comparison of different solid phase extraction materials and techniques by application of multiresidue methods for the determination of pesticides in water by high-performance liquid chromatography (HPLC)

Solid phase extraction materials and techniques (C-18 EMPORE^® disks, polystyrenedivinylbenzene (SDB) EMPORE^® disks, C-18 BondElut cartridges and ENVI-Carb cartridges) are compared for the preconcentration of 33 basic/neutral and 10 acidic/phenolic pesticides and three metabolites in water. The efficiency of the different extraction procedures was investigated by application of appropriate multiresidue separation methods by reversed phase-high performance liquid chromatography with UV-diode-array detection. Calibrations were performed with multicomponent standard mixtures and recoveries, relative standard deviations and determination limits were calculated for comparing the described enrichment methods. Experiences made in practical application of the different techniques and materials were also considered for the final evaluation.