Objective To establish a method for the simultaneous determination of 5 pyrethroids in source water or drinking water, i.e. fenpropathrin, cyhalothrin, deltamethrin, fenvalerate, and permethrin, using solid phase extraction combined with high performance liquid chromatography.
Methods The water samples were extracted and condensed with solid-phase extraction using C18 cartridges and eluted by isopropanol. Separation was carried out on a Waters Sunfire C18 column, using acetonitrile and water as mobile phase gradient model at a flow rate of 1.0 mL/min, with detective wavelength at 205 nm. Quantification was calculated by an external standard method.
Results The linear range of proposed determination methodology was 0.0-5.0 mg/L. The minimum detectable concentration was 0.025-0.050 μg/L. The recoveries were between 88.0% and 102.2% with a relative standard deviation in the range of 1.0%-3.8%.
Conclusion The method is sensitive, accurate, and applicable to detect the trace pyrethroid residues in source water and drinking water.
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