Analytical studies for determination of xenobiotics from the class of priority substances (Chlorfenvinphos, Chlorpyrphos, Trychlorfon) in water, according to HG 351/2005.

Abstract

Development of analytical methods for the determination of some organo phosphorus pesticides included in the list of priority substance (Chlorfenvinphos, Chlorpyrphos, Trychlorfon, Dichlorvos, Cumaphos) form wastewater using GC-NPD technique and HPLC-UV technique. Two extraction techniques were tested : Liquid-Liquid Extraction(LLE) with Hexane and Solid Phase Extraction ( SPE) on C18 adsorbent with different extraction solvents. Both methods indicated a good recovery (83%-94%). The methods were validated “in-house”. The detection limits (0.02 μg/L – 0.06 μg/L) were situated under the imposed concentrations according to the legislation for priority substances. The methods are used for the analytical control of organophosphorus pesticides from different categories of water samples.