CAS Key Laboratory of Chemistry of Northwestern Plant Resources, Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
CAS Key Laboratory of Chemistry of Northwestern Plant Resources, Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
Anal Chim Acta. 2020 Sep 8;1129:85-97. doi: 10.1016/j.aca.2020.06.077. Epub 2020 Jul 16.
A magnetic porous carbon (FeO@PC) was successfully fabricated based on combustion combined with solvothermal method, and then used as magnetic solid-phase extraction absorbent for the determination of four triazole fungicides. The porous carbon was fabricated by imperfect combustion of filter paper loaded with zinc nitrate hexahydrate, which possessed extremely abundant pores, high specific surface area (908.05 m g) and large pore volume. Due to the introduction of solvothermal method used to prepare FeO@PC, homogeneously distributed magnetic nanoparticles and high saturation magnetization were obtained. Compared with another magnetic porous carbon (FeO@C), FeO@PC obviously enhanced enrichment factors and extraction recoveries. Several key parameters influencing extraction efficiency were optimized. The satisfactory enrichment factors, low limits of detection of the method and good linearities were achieved under the optimal conditions. The relative recoveries ranged from 82.8% to 113.2% in three spiked real samples with relative standard deviations lower than 6.2%. The results indicated the great potential of the novel FeO@PC as adsorbent for the extraction of triazole fungicides from complex real samples.
一种基于燃烧结合溶剂热法成功制备的磁性多孔碳（FeO@PC），然后用作磁性固相萃取吸附剂，用于测定四种三唑类杀菌剂。多孔碳是由负载六水合硝酸锌的滤纸不完全燃烧制备的，具有极其丰富的孔、高比表面积（908.05 m²/g）和大孔体积。由于采用溶剂热法制备 FeO@PC，因此获得了均匀分布的磁性纳米颗粒和高饱和磁化强度。与另一种磁性多孔碳（FeO@C）相比，FeO@PC 明显提高了富集因子和萃取回收率。在最佳条件下，该方法获得了令人满意的富集因子、低检测限和良好的线性关系。在三个实际加标样品中，相对回收率在 82.8%至 113.2%之间，相对标准偏差低于 6.2%。结果表明，新型 FeO@PC 作为吸附剂从复杂实际样品中萃取三唑类杀菌剂具有很大的潜力。
