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3. Analysis of pesticides in seawater after enrichment onto C8 bonded-phase cartridges;Hinckley;Environ. Sci. Technol.,1989
4. Isolation and recovery of organophosphorus pesticides from water by solid-phase extraction with dual wide-bore capillary gas chromatography;Loconto;J. Chromatogr.,1989
5. Cleanup of environmental sample extracts using Florisil solid-phase extraction cartridges;Lopez-Avila;J. Chromatogr.,1989