Abstract
Graphene, as a kind of novel and interesting carbon material, has gained much attention in recent years. In this paper, a new sample preparation technique, graphene reinforced hollow fiber liquid phase microextraction (G-HF-LPME), was developed and used to pre-concentrate some phenylurea herbicides (chlortoluron, isoproturon, diuron, monolinuron, and buturon) in milk sample prior to high-performance liquid chromatography–ultraviolet detection. Different parameters influencing the extraction efficiency of the G-HF-LPME were investigated and optimized. Under the optimized conditions, a good linearity was observed in the range between 10.0 and 400.0 μg L−1 with the correlation coefficients ranging from 0.9911 to 0.9987. The limit of detection (S/N = 3) of the method was lower than 2.0 μg L−1. The developed method is simple, efficient, and has been successfully applied to the determination of the phenylureas in milk samples.
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Acknowledgments
This study was supported by the National Natural Science Foundation of China (no. 31171698), the Science and Technology Supporting Program of Hebei Province (no. 12396908D), and the Natural Science Foundation of Hebei Province (B2012204028).
Conflict of Interest
Meng Sun declares that she has no conflict of interest. Ranxiao Tang declares that she has no conflict of interest. Qiuhua Wu declares that she has no conflict of interest. Chun Wang declares that he has no conflict of interest. Zhi Wang declares that he has no conflict of interest. This article does not contain any studies with human or animal subjects.
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Sun, M., Tang, R., Wu, Q. et al. Graphene Reinforced Hollow Fiber Liquid Phase Microextraction for the Enrichment of some Phenylurea Residues in Milk Sample. Food Anal. Methods 7, 1097–1102 (2014). https://doi.org/10.1007/s12161-013-9719-0
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DOI: https://doi.org/10.1007/s12161-013-9719-0