Titanium dioxide nanotubes for solid phase extraction of benzoylurea insecticides in environmental water samples,and determination by high performance liquid chromatography with UV detection

摘要

A new, simple and sensitive method was established for solid-phase extraction of benzoylurea insecticides including diflubenzuron, chlorbenzuron, triflumuron, flufe-noxuron, and chlorfluazuron in water samples using TiO2 nanotubes cartridge prior to their determination by liquid chromatography. The parameters influencing the extraction were investigated and optimized. Under optimal conditions, a good linearity was found between the concentration and the peak area in the range from 0.2 to 40 μg L~(-1) (r~2>0.99), and detection limits were in the range from 0.062 to 0.21 μg L~(-1). Real water samples were used for validating the method and recoveries of spiked samples were over the range from 82.0 to 100%. The results indicated that TiO2 nanotubes repesented an attractive alternative sorbent for the enrichment and trace analysis of such pollutants.