用基于石墨烯的巴基凝胶对钢纤维进行改性,用于在气相色谱法定量之前对挥发性芳烃进行顶空固相微萃取。

Modification of a steel fiber with a graphene based bucky gel for headspace solid-phase microextraction of volatile aromatic hydrocarbons prior to their quantification by GC.

作者信息

Yousefi Seyedeh Mahboobeh, Shemirani Farzaneh, Ghorbanian Sohrab Ali

机构信息

School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran.

Faculty of Chemical Engineering, School of Engineering, University of Tehran, Tehran, Iran.

出版信息

Mikrochim Acta. 2018 Oct 18;185(11):509. doi: 10.1007/s00604-018-3017-x.

Abstract

A graphene based bucky gel-coated stainless steel fiber was prepared and applied to headspace solid phase microextraction of volatile organic compounds. Graphene was mixed with an ionic liquid to produce a bucky gel that displays the attractive features of both compounds. It can be directly deposited on an etched stainless steel wire to give the fiber for use in extraction of benzene, toluene, ethylbenzene and xylene (BTEX) isomers. The presence of graphene favors the π-interaction between the sorbent and aromatic analytes. The sorbent is thermally stable up to 300 °C and can be used more than 50 times. It was characterized by field emission scanning electron microscopy, FT-IR spectroscopy and thermogravimetric analysis. Under optimized conditions, linear responses were found in the range of 0.11-5000 μg L for toluene, 0.15-5000 for benzene and o-xylene, 0.17-5000 for m- and p-xylene and 0.20-5000 for ethylbenzene. Limits of detection are between 0.03 and 0.06 μg L (at an S/N ratio of 3). The run-to-run RSDs are <5.8% (for n = 6), and fiber-to-fiber RSDs are 4.1-9.2% (n = 4). The method was successfully applied to the extraction of BTEX isomers in spiked urine samples and gave recoveries between 88 and 105%. Graphical abstract Graphene based bucky gel (G-BG) was prepared by mixing an ionic liquid with graphene. It was physically deposited on stainless steel wire. The fiber was applied to the headspace solid phase microextraction (HS-SPME) of benzene, toluene, ethylbenzene and xylenes.

摘要

制备了一种基于石墨烯的巴基凝胶包覆不锈钢纤维,并将其应用于挥发性有机化合物的顶空固相微萃取。将石墨烯与离子液体混合以制备兼具两种化合物诱人特性的巴基凝胶。它可以直接沉积在蚀刻的不锈钢丝上,制成用于萃取苯、甲苯、乙苯和二甲苯(BTEX)异构体的纤维。石墨烯的存在有利于吸附剂与芳香族分析物之间的π相互作用。该吸附剂在高达300℃的温度下热稳定,可使用50多次。通过场发射扫描电子显微镜、傅里叶变换红外光谱和热重分析对其进行了表征。在优化条件下,甲苯的线性响应范围为0.11 - 5000μg/L,苯和邻二甲苯为0.15 - 5000,间二甲苯和对二甲苯为0.17 - 5000,乙苯为0.20 - 5000。检测限在0.03至0.06μg/L之间(信噪比为3)。批内相对标准偏差<5.8%(n = 6),纤维间相对标准偏差为4.1 - 9.2%(n = 4)。该方法成功应用于加标尿液样品中BTEX异构体的萃取,回收率在88%至105%之间。图形摘要 通过将离子液体与石墨烯混合制备了基于石墨烯的巴基凝胶(G - BG)。它物理沉积在不锈钢丝上。该纤维应用于苯、甲苯、乙苯和二甲苯的顶空固相微萃取(HS - SPME)。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索