Shahriman Mohamad Shariff, Ramachandran Muggundha Raoov, Zain Nur Nadhirah Mohamad, Mohamad Sharifah, Manan Ninie Suhana Abdul, Yaman Suhaila Mohd
Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, 13200 Kepala Batas, Penang, Malaysia.
Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, 13200 Kepala Batas, Penang, Malaysia.
Talanta. 2018 Feb 1;178:211-221. doi: 10.1016/j.talanta.2017.09.023. Epub 2017 Sep 12.
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 (0.005-500µgL) with the coefficient of determination (R) > 0.999. The limits of detection (LOD) and quantification (LOQ) of the developed method (MNP-PANI-DICAT-MSPE) were in the range of 0.0008-0.2086µgL and 0.0024-0.6320µgL, 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，成功合成了用聚苯胺（PANI）修饰的磁性纳米颗粒（MNPs）纳米复合材料，该复合材料包覆新合成的双阳离子离子液体（DICAT），形成MNP-PANI-DICAT，作为新一代磁性固相萃取（MSPE）材料。通过傅里叶变换红外光谱（FT-IR）、核磁共振（NMR）、元素分析（CHN）、比表面积分析（BET）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和振动样品磁强计（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。由于聚苯胺壳层与双阳离子离子液体（DICAT）与多环芳烃（PAHs）化合物之间的π-π相互作用，这种新材料被用作磁性吸附剂，用于多环芳烃的预浓缩和分离。在最佳条件下，对所提出的方法进行了评估，并应用于使用气相色谱-质谱联用仪（GC-MS）分析环境样品中的多环芳烃。验证方法显示出良好的线性关系（0.005-500µgL），测定系数（R）>0.999。所开发方法（MNP-PANI-DICAT-MSPE）的检测限（LOD）和定量限（LOQ）分别在0.0008-0.2086µgL和0.0024-0.6320µgL范围内。多环芳烃在MNP-PANI-DICAT-MSPE上的富集因子（EF）在7.546-29.632范围内。天然水、污泥和土壤样品的萃取回收率在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在各种环境样品的MSPE程序下对多环芳烃具有良好的灵敏度、可重复使用性和快速萃取能力。
