Analysis of Pesticides Using the Detector Switching System

Analysis of Pesticides Using the Detector Switching System

A high-sensitivity selective detector is normally used for pesticide residue analysis using GC. A selective detector is effective for impurity components derived from agricultural crops but multiple detectors are required for the selective detection of all pesticide components. The detector switching system enables this analysis by switching between detectors with different selectivity. This system obtains accurate analytical information from multiple detectors with no deterioration in sensitivity, as the sample volume introduced into each detector is identical to the volume for analysis by a single detector, i.e.the entire eluted peak volume is sent to a single detector rather than splitting it among two or more detectors. The analysis introduced below is the simultaneous analysis of a pesticide sample by switching between a flame photometric detector (FPD) and electron capture detector (ECD).

Analysis by Detector Switching (FPD-ECD)

The FPD selectively detects organophosphate pesticides, while the ECD offers high-sensitivity analysis of chlorinated pesticides. Even residual pesticide analysis for many target components can be efficiently and accurately handled by a single analysis.

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