DETECTION AND DETERMINATION OF PESTICIDE- RESIDUES BY HPLC AND GC

A procedure for detection and determination of pesticide residues in f ruit and vegetables (apples, potatoes and carrots) is described. As we ll as 20 of 33 current compounds of different chemical belonging will simultaneous recorded by HPLC/UV-detection and GC-ECD. The efficiency of the method is tested by means of recovery experiments concerning th e apple. The recovery rate is between 38 and 112% for all of the 20 si multaneous determinable compounds. The detection-limits of HPLC for al l of the 28 determinable compounds are in the range of 0.01 mg/kg. For the GC they are in dependence on the compound between 0.0006 and 0.01 5 mg/kg referring to the fresh weight. The GC method allows the determ ination of 25 different pesticides. A monitoring study, in which 40 sa mples of apples, potatoes and carrots of different origin and type res pectively were examined, should demonstrate the relevance of the selec ted reference standards. In one apple sample cr-endosulfan, in one pot ato sample tetradifone and in one carrot sample iprodione were detecte d.