USE OF HILIC-CHROMATOGRAPHIC SEPARATION AND SOLID PHASE EXTRACTION FOR PREPARING AND ANALYZING PESTICIDES

摘要

An arrangement (10) for preparing samples and analyzing pesticides in samples contains an HILIC chromatography column (14) with a first pump (12) for a predominantly low-water and/or non-polar solvent; an SPE enrichment arrangement (22); a second chromatography column (28) with a second pump (18) for a predominantly water-rich and/or polar solvent; a detector (32); and a valve arrangement (20, 24) for controlling the stream of sample and matrix, which valve arrangement is designed in such a way that the sample stream, in a first switching state (fig. 1) of the valve arrangement, can be conducted from the HILIC chromatography column (14) to the SPE enrichment arrangement (22) and, in a second switching state (fig. 2), the sample enriched in the SPE enrichment arrangement (22) can be conducted in the opposite direction from the SPE enrichment arrangement (22) through the second chromatography column (28) to the detector (32).