Department of Chemistry, Faculty of Sciences, Hakim Sabzevari University, Sabzevar, 9617976487, Iran.
Mikrochim Acta. 2018 Jul 28;185(8):393. doi: 10.1007/s00604-018-2928-x.
A magnetic sorbent was fabricated by coating the magnetized graphene oxide with polystyrene (PS) to obtain a sorbent of the type GO-FeO@PS. The chemical composition and morphology of the sorbent were characterized. The sorbent was employed for the enrichment of polycyclic aromatic hydrocarbons (PAHs) from water samples. Various parameters affecting the enrichment were investigated. The PAHs were then quantified by gas chromatography with flame ionization detection. Linear responses were found in the range of 0.03-100 ng mL for naphthalene and 2-methylnaphthalene, and of 0.01-100 ng mL for fluorene and anthracene. The detection limits (at an S/N ratio of 3) range between 3 and 10 pg mL. The relative standard deviations (RSDs) for five replicates at three concentration levels (0.05, 5 and 50 ng mL) of analytes ranged from 4.9 to 7.4%. The method was applied to the analysis of spiked real water samples. Relative recoveries are between 95.8 and 99.5%, and RSD% are <8.4%. Graphical abstract A magnetic sorbent was fabricated by polystyrene coated on the magnetic graphene oxide for the extraction and preconcentration of PAHs in water samples prior to their determination by gas chromatography with flame ionization detection.
通过在磁性氧化石墨烯上涂覆聚苯乙烯（PS）来制备磁性吸附剂，得到 GO-FeO@PS 型吸附剂。对吸附剂的化学组成和形态进行了表征。该吸附剂用于从水样中富集多环芳烃（PAHs）。考察了影响富集的各种参数。然后通过气相色谱法（火焰离子化检测）对 PAHs 进行定量。萘和 2-甲基萘在 0.03-100ng/mL 范围内，芴和蒽在 0.01-100ng/mL 范围内呈现线性响应。检测限（S/N 比为 3）在 3 至 10pg/mL 之间。五种浓度水平（0.05、5 和 50ng/mL）的分析物重复五次的相对标准偏差（RSD）在 4.9 至 7.4%之间。该方法应用于加标实际水样的分析。相对回收率在 95.8%至 99.5%之间，RSD%<8.4%。
