In this present study, magnetic nanoparticles (MNPs) nanocomposites modified with polyaniline (PANI) coated newly synthesised dicationic ionic liquid (DICAT) forming MNP-PANI-DICAT were successfully synthesised as new generation material for magnetic solid phase extraction (MSPE). MNP-PANI-DICAT was characterised by FT-IR NMR, CHN, BET, SEM, TEM, and VSM techniques and the results were compared with MNP-PANI and native MNP. This new material was applied as a magnetic adsorbent for the pre-concentration and separation of polycyclic aromatic hydrocarbons (PAHs) due to the π–π interaction between polyaniline shell and dicationic ionic liquid (DICAT) with PAHs compounds. Under the optimal conditions, the proposed method was evaluated and applied for the analysis of PAHs in environmental samples using gas chromatography-mass spectrometry (GC-MS). The validation method showed good linearity (0.005–500 µg L⁻¹) with the coefficient of determination (R²) > 0.999. The limits of detection (LOD) and quantification (LOQ) of the developed method (MNP-PANI-DICAT-MSPE) were in the range of 0.0008–0.2086 µg L⁻¹ and 0.0024–0.6320 µg L⁻¹, respectively. The enrichment factor (EF) of PAHs on MNP-PANI-DICAT-MSPE were in the range of 7.546–29.632. The extraction recoveries of natural water, sludge, and soil samples were ranged from 80.2% to 111.9% with relative standard deviation (RSD) less than 5.6%. The newly synthesised MNP-PANI-DICAT possess good sensitivity, reusability, and fast extraction of PAHs under the MSPE procedure in various environmental samples.

在本研究中，成功​​地合成了用聚苯胺（PANI）包覆的新合成的阳离子型离子液体（DICAT）改性的磁性纳米颗粒（MNPs）纳米复合材料，形成了MNP-PANI-DICAT，作为磁性固相萃取（MSPE）的新一代材料。通过FT-IR NMR，CHN，BET，SEM，TEM和VSM技术对MNP-PANI-DICAT进行了表征，并将结果与​​MNP-PANI和天然MNP进行了比较。由于聚苯胺壳和阳离子型离子液体（DICAT）与PAHs化合物之间存在π-π相互作用，因此这种新材料被用作预浓缩和分离多环芳烃（PAHs）的磁性吸附剂。在最佳条件下，对所提出的方法进行了评估，并用于气相色谱-质谱法（GC-MS）分析环境样品中的多环芳烃。^-1）的测定系数（R ²）> 0.999。所开发方法（MNP-PANI-DICAT-MSPE）的检出限（LOD）和定量限（LOQ）分别在0.0008–0.2086 µg L ^-1和0.0024–0.6320 µg L ^-1之间。MNP-PANI-DICAT-MSPE上PAHs的富集因子（EF）在7.546-29.632之间。天然水，污泥和土壤样品的提取回收率在80.2％至111.9％之间，相对标准偏差（RSD）小于5.6％。新合成的MNP-PANI-DICAT具有良好的灵敏度，可重复使用性，并且在MSPE程序下可在各种环境样品中快速提取PAH。