Qi FeiFei, Li XiaoQing, Yang BiYi, Rong Fei, Xu Qian
Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China.
State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China; Suzhou Key Laboratory of Environment and Biosafety, Suzhou 215123, China.
Talanta. 2015 Nov 1;144:129-35. doi: 10.1016/j.talanta.2015.05.040. Epub 2015 May 27.
A novel disks solid phase extraction (SPE) based on polypyrrole (PPy) functionalized core-shell electrospun nanofibers mat was proposed. The performance of the established disks SPE technique was evaluated in the extraction of trace polar analytes from environmental water samples. Disulphonated (acid yellow 9) and monosulphonated azo dyes (acid orange 7 and metanil yellow) were selected as typical model analytes. Under the optimum conditions, detection limits were 0.15-0.3 μg/L for all target analytes and the enrichment coefficients were 106-121. The recoveries of sulfonated azo dyes added to typical environmental water samples were 87.6-112.3%, suggesting that the interferences of the sample matrix did not affect the enrichment. Compared with existing methods, the device in this study showed higher recovery, lower detection limit and better precision. Moreover, the miniaturized disks SPE technique for sample preparation is simple and fast, with significantly reduced sorbent bed mass (2.5 mg) and eluent volume (500 μL). These results indicate that PPy nanofibers mat-based disks SPE may be a promising device that can effectively extract the polar species in water samples.
提出了一种基于聚吡咯（PPy）功能化核壳电纺纳米纤维垫的新型圆盘固相萃取（SPE）方法。在从环境水样中萃取痕量极性分析物时，对所建立的圆盘SPE技术的性能进行了评估。选择二磺化（酸性黄9）和单磺化偶氮染料（酸性橙7和甲基橙黄）作为典型的模型分析物。在最佳条件下，所有目标分析物的检测限为0.15 - 0.3 μg/L，富集系数为106 - 121。添加到典型环境水样中的磺化偶氮染料的回收率为87.6 - 112.3%，表明样品基质的干扰不影响富集。与现有方法相比，本研究中的装置具有更高的回收率、更低的检测限和更好的精密度。此外，用于样品制备的小型化圆盘SPE技术简单快速，吸附剂床质量（2.5 mg）和洗脱液体积（500 μL）显著减少。这些结果表明，基于PPy纳米纤维垫的圆盘SPE可能是一种有前景的装置，能够有效萃取水样中的极性物质。
