Simultaneous identification and determination of three different classes of pesticides in Tehran drinking water by HPLC/UV technique

An efficient sample extraction using solidphase extraction coupled with liquidchromatography was studied for the analyses of three different types and chemical group pesticides from drinking water. The extraction was performed using a Waters SepPak C18 cartridge. A validation of the method was performed. Linearity (0.0051000, 0.011000, 41000, 10.51000 and 9.481000 µg.L1 for Simazine, Atrazine, Isoproturon, Metolachlor and Chlorotoluron respectively range), withinday precisions ranged from 4.8 to 6.7% and the between day precisions ranged of 7.813.3 % based on the peak areas for five replicates, limits of detection (0.0012.846 µg.L1) were calculated. The preconcentration factors (PFs) were obtained under the optimum conditions (15.0422.53). The information obtained from the method validation has been used to estimate for the determination of pesticides at trace levels in water samples which collected from water treatment plants of Tehran, the capital of Iran.