Abstract：
This study introduced an innovative magnetic effervescence-assisted microextraction method, streamlining the preparation of effervescent tablets through a one-pot method that blends a CO2 donor (Na2CO3) and an H+ donor (NaH2PO4) with bare magnetic particles (Fe3O4) and an adsorbent (hydroxylated multi-walled carbon nanotubes), followed by pressing. During the extraction process, the bare magnetic particles and adsorbent undergo in-situ self-assembly to create a magnetic adsorbent. The effervescence generates bubbles that enhance effective extraction and magnetism facilitates the easy separation of the magnetic adsorbent from the sample solution, completing the process within 4 min. Applied to organochlorine pesticide analysis in fruit juices and herbal extracts, the method exhibits excellent linearity (R2 > 0.993), sensitivity (detection limits: 0.010-0.125 ng/mL), accuracy (recoveries: 85.8-99.9%), and precision (RSDs < 9.7%) with GC-ECD. Overall, this approach stands out for its simplicity, cost-effectiveness, and suitability for on-site analysis, owing to its operational ease and independence from specialized equipment.
摘要：
这项研究介绍了一种创新的磁性泡腾辅助微萃取方法，通过一锅法简化泡腾片的制备，该方法将CO2供体（Na2CO3）和H供体（NaH2PO4）与裸露的磁性颗粒（Fe3O4）和吸附剂（羟基化的多壁碳纳米管）混合，然后按。在提取过程中,裸磁性颗粒和吸附剂经历原位自组装以产生磁性吸附剂。泡腾产生气泡，增强有效提取和磁性促进磁性吸附剂从样品溶液中的容易分离，在4分钟内完成该过程。应用于果汁和草药提取物中的有机氯农药分析，该方法具有良好的线性(R2>0.993)，灵敏度（检测限：0.010-0.125ng/mL），准确度(回收率:85.8-99.9%)，和精密度(RSD<9.7%)与GC-ECD。总的来说,这种方法以其简单性脱颖而出，成本效益，以及现场分析的适用性，由于其操作简便和独立于专用设备。
