[HPTLC for the confirmation of results in the analysis of pesticide residues].

HPTLC is an effective method for confirming gas-chromatographic results for insecticide and fungicide residues in sample solutions obtained by clean-up of fruit and vegetable extracts according to the Deutsche Forschungsgemeinschaft multiresidue method S 19. This study describes the possible interference caused by co-extractives from some crops rich in typical components, and gives the best operating conditions for separating and detecting the residues by HPTLC on silica gel and C18 reversed-phase material. The routine limit of determination was 0.

[Identification and quantitative determination of currently important plant protectants by HPTLC].

This systematic study describes the determination of approximately 150 pesticides (mainly insecticides and fungicides) on high-performance thin-layer chromatography (HPTLC) layers, using modern techniques for spotting and evaluation. Standardized mobile phases and reagents for visualization form the basis for the confirmation of gas-chromatographic results by HPTLC. The very high sensitivity of cholinesterase inhibition can be utilized only on plates coated with silica gel.