AUTOMATIC-MEASUREMENT OF PESTICIDES IN DRINKING-WATER USING ONLINE SOLID-PHASE EXTRACTION, HPLC AND CHEMOMETRY

Using an automated on-line phase extraction device, followed by HPLC, various pesticides groups can be separated and quantified chromatographically in a single run. By using a diode-array detector capable of automatically identifying components and determining their homogeneity by utilizing multiple, non subjective spectral comparison techniques, correct results can be obtained. For peaks that co-elute due to inadequate resolution, Multi Component Analysis (MCA) provides quantitative accuracy with a determination limit as low as 0.010 mug/L with few exceptions.