Magnetic graphene oxide composite was studied for dispersive solid phase microextraction of fenoxaprop-p-ethyl herbicide (FPE) from different samples (water, soil and wheat) and determined by high performance liquid chromatography with ultraviolet detector. The composite was prepared and characterized using Scanning electron microscopy, Fourier transform infrared and X-ray diffraction spectroscopic techniques. Different conditions for the extraction of FPE were investigated such as mass of sorbent, solution pH, extraction time and solvent for extraction of FPE from sorbent. At optimum conditions, a linear response was achieved in the range of 0.5–30 µg L⁻¹ with a high determination of coefficient (R² = 0.9989). The limit of detection and limit of quantification was found 0.03 µg L⁻¹ and 0.11 µg L⁻¹, respectively. The proposed method was used for determination of FPE in water and wheat samples, with spiked recoveries of 84–97% with relative standard deviation less than 5%, indicating that the proposed sorbent could be promising sorbent for extraction of FPE herbicide in water, wheat and soil samples.

中文翻译：

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使用磁性石墨烯复合材料从水和食物样品中分散性固相微萃取苯甲草酸对乙基除草剂

研究了磁性氧化石墨烯复合材料用于从不同样品（水，土壤和小麦）中分散分散固相微萃取苯并丙酸对乙基除草剂（FPE）的性能，并通过高效液相色谱仪和紫外检测器进行测定。使用扫描电子显微镜，傅立叶变换红外和X射线衍射光谱技术制备并表征复合材料。研究了萃取FPE的不同条件，例如吸附剂的质量，溶液的pH值，萃取时间和从吸附剂中萃取FPE的溶剂。在最佳条件下，线性响应范围为0.5–30 µg L ^-1，具有很高的系数确定性（R ²  = 0.9989）。检出限和定量限为0.03 µg L^-1和0.11 µg L ^-1。该方法用于水和小麦样品中FPE的测定，加标回收率为84–97％，相对标准偏差小于5％，表明该吸附剂对于水，小麦中FPE除草剂的萃取具有广阔的前景。和土壤样品。