The Determination of Sulfonylurea Herbicides in Drinking Water by Solid-phase Extraction Coupled with High Performance Liquid Chromatography
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Abstract:
The determination of tribenuron-methyl and chlorsulfuron belonged to sulfonylurea herbicides in drinking water was developed based on solid-phase extraction coupled with high performance liquid chromatography (SPE-HPLC) technology. The high selectivity material was synthesized using methacrylic acid as function monomer, ethylene glycol dimethacrylate as cross-linker, and azodiisobutyronitrile as initiator. Then, tribenuron-methyl and chlorsulfuron were extracted by employing the material as absorbent. Several condition parameters, such as elution solvents, volume and sample pH, were optimized to obtain high recoveries. It was found that the linearity was good ranging from 0.1 mg/L to 5 mg/L; the limit of detections of this method for tribenuron-methyl and chlorsulfuron were 0.74 μg/L and 0.81 μg/L, respectively; and the RSD for seven replicate extractions was 1.30% and 2.10%, respectively. Under the optimized conditions, the blank water spiked with different levels of tribenuron-methyl and chlorsulfuron mixture (10 μg/L, 15 μg/L, 20 μg/L) were extracted and determined with the same method, the recoveries of tribenuron-methyl and chlorsulfuron were 70.14~80.24% and 76.52~106.03%, respectively. This method can be applied for the quantitative analysis of sulfonylurea herbicides in drinking water.
