Magnetic microsphere-confined graphene for the extraction of polycyclic aromatic hydrocarbons from environmental water samples coupled with high performance liquid chromatography-fluorescence analysis.
Magnetic microsphere-confined graphene for the extraction of polycyclic aromatic hydrocarbons from environmental water samples coupled with high performance liquid chromatography-fluorescence analysis.
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DOI：
10.1016/j.chroma.2013.03.071
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发表时间：
2013-06
期刊：
影响因子：
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通讯作者：
Weina Wang;R. Ma;Qiuhua Wu;Chun Wang;Zhi Wang
中科院分区：
文献类型：
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作者：
Weina Wang;R. Ma;Qiuhua Wu;Chun Wang;Zhi Wang
制备了磁性微球-石墨烯吸附剂（Fe3O4@SiO2-G），并将其用于萃取环境水样中的5种多环芳烃（芴、蒽、菲、荧蒽和芘），然后进行高效液相色谱荧光检测。通过各种仪器方法表征Fe3O4@SiO2-G。考察了Fe3O4@SiO2-G用量、样品溶液pH值、离子强度、萃取时间和解吸条件等因素对萃取效率的影响。由于Fe3O4@SiO2-G的高比表面积和优异的吸附能力，每250 mL溶液仅需15 mg吸附剂和5 min萃取即可实现令人满意的萃取。在最佳条件下，芴、蒽、菲、荧蒽和芘的线性范围分别为5- 1500 ngL-1、2.5- 1500 ngL-1和15- 1500 ngL-1，相关系数r为0.9897 - 0.9961。该方法的检测限（S/N=3）在0.5 - 5.0ngL-1之间。相对标准偏差（RSD）小于5.6%。方法的回收率在83.2%~ 108.2%之间。结果表明，该石墨烯基磁性纳米复合材料对环境水样中的5种多环芳烃具有较强的吸附能力。
In this paper, a magnetic microsphere-confined graphene adsorbent (Fe3O4@SiO2-G) was fabricated and used for the extraction of five polycyclic aromatic hydrocarbons (fluorene, anthracene, phenanthrene, fluoranthene and pyrene) from environmental water samples prior to high performance liquid chromatography with fluorescence detection. The Fe3O4@SiO2-G was characterized by various instrumental methods. Various experimental parameters that could affect the extraction efficiencies, such as the amount of Fe3O4@SiO2-G, the pH and ionic strength of sample solution, the extraction time and the desorption conditions, were investigated. Due to the high surface area and excellent adsorption capacity of the Fe3O4@SiO2-G, satisfactory extraction can be achieved with only 15mg of the adsorbent per 250mL solution and 5min extraction. Under the optimum conditions, a linear response was observed in the concentration range of 5–1500ngL−1for fluorene, 2.5–1500ngL−1for anthracene and 15–1500ngL−1for phenanthrene, fluoranthene and pyrene, with the correlation coefficients (r) ranging from 0.9897 to 0.9961. The limits of detection (S/N=3) of the method were between 0.5 and 5.0ngL−1. The relative standard deviations (RSDs) were less than 5.6%. The recoveries of the method were in the range between 83.2% and 108.2%. The results indicated that this graphene-based magnetic nanocomposite had a great adsorptive ability toward the five polycyclic aromatic hydrocarbons from environmental water samples.