Data from: Determination of sulfonamides in milk by capillary electrophoresis with PEG@MoS2 as a dispersive solid-phase extraction sorbent

A synthetic polyethylene glycol-molybdenum disulfide (PEG@MoS2) composite was prepared using a simple method, and the application of this material in dispersive solid-phase extraction (DSPE) was investigated for the enrichment of eight sulfonamides (SAs) in milk samples. The composite was characterized by energy dispersive spectroscopy, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy and Brunner-Emmett-Teller measurements. The results showed that the MoS2 synthesized in the presence of PEG has the advantage of a larger surface area and that the adsorption effect of this MoS2 was enhanced. After extraction, the eight SAs were separated by capillary zone electrophoresis with a good linear relationship (R2 > 0.9902) in the range of 0.3-30 µg/mL and good precision (between 0.32% and 9.83%). Additionally, good recoveries (between 60.52% and 110.91%) were obtained for the SAs in the milk samples. The developed PEG@MoS2-based DSPE method could be applied for the enrichment of SAs in real milk samples.本研究采用简便方法制备了聚乙二醇-二硫化钼（polyethylene glycol-molybdenum disulfide，PEG@MoS2）复合材料，并探究了该材料应用于分散固相萃取（dispersive solid-phase extraction，DSPE）以富集牛奶样品中8种磺胺类药物（sulfonamides，SAs）的效果。采用能量色散光谱、扫描电子显微镜、透射电子显微镜、傅里叶变换红外光谱及布鲁诺尔-埃米特-泰勒（Brunner-Emmett-Teller，BET）比表面积测试对该复合材料进行了表征。结果表明，在聚乙二醇存在下合成的二硫化钼具有更大的比表面积，且其吸附性能得到了提升。萃取完成后，采用毛细管区带电泳对8种磺胺类药物进行分离，该方法在0.3~30 μg/mL浓度范围内线性关系良好（R² > 0.9902），精密度优异，相对标准偏差介于0.32%~9.83%之间。此外，牛奶样品中磺胺类药物的加标回收率介于60.52%~110.91%之间，回收率表现良好。所建立的基于PEG@MoS2的分散固相萃取方法可用于实际牛奶样品中磺胺类药物的富集。