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Determination of five sulfonylurea herbicides in environmental waters and soil by ultra high performance liquid chromatography with tandem mass spectrometry after extraction using graphene
- Li, Cheng, Lu, Anxiang, Wang, Jihua, Li, Jie, Ping, Hua, Luan, Yunxia, Chen, Jiayi, Ha, Xuejiao
- Journal of separation science 2014 v.37 no.24 pp. 3714-3721
- correlation, detection limit, graphene, herbicide resistance, soil, soil pollution, soil sampling, solid phase extraction, sulfonylurea herbicides, tandem mass spectrometry, ultra-performance liquid chromatography, water pollution
- A fast and novel analytical method was developed for the determination of trace levels of sulfonylurea herbicides in water and soil samples. Graphene was used as a sorbent for extraction, and ultra high performance liquid chromatography with tandem mass spectrometry was used for quantification. Five sulfonylurea herbicides were preconcentrated from water samples using a graphene‐loaded packed cartridge, while extraction from soil samples was performed in a single step using graphene‐supported matrix solid‐phase dispersion. Under the optimized conditions, the calibration plots were linear in the range between 5 and 1000 ng/L for water samples, and between 1 and 200 ng/g for soil samples. All correlation coefficients (R) were >0.99. The limits of detection for water and soil samples were 0.28–0.53 ng/L and 0.08–0.26 ng/g, respectively. This method was successfully applied to the analysis of spiked samples of environmental water and soil, with recoveries ranging from 84.2–109.3 and 86.12–103.2%, respectively, all with relative standard deviations of <10%.