CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Mikrochim Acta. 2019 May 24;186(6):375. doi: 10.1007/s00604-019-3498-2.
A novel solid/liquid phase microextraction (SLPME) technique was developed and applied to the simultaneous determination of five bisphenol-type endocrine disrupting chemicals (EDCs) including bisphenol A, bisphenol S, bisphenol F, bisphenol B and bisphenol AF. The method is based on the use of a graphene oxide nanoribbon-reinforced hollow fiber (GONRs-HF) and 1-octanol. GONRs were longitudinally unzipped from multiwalled carbon nanotubes (MWCNTs) by means of chemical oxidation and carefully characterized. GONRs were dispersed in ultrapure water with the assistance of surfactant and then immobilized into the wall pores of HF. Compared with CNTs, the hydrophilicity of GONRs was improved, and a uniform dispersion was formed. This simplifies the preparation process and reduces waste of materials. The pores and lumen of GONRs-HF were filled with 1-octanol, and then the whole assembly was used for the extraction of the analytes. In comparison with different extraction modes, GONRs-HF-SLPME exhibits a more effective extraction performance for five bisphenol-type EDCs. Response surface methodology was used to optimize experimental parameters affecting the extraction efficiency. The enrichment factors are in the range from 76 to 127 with good inter-fiber and batch-to-batch reproducibility. The method shows good linearity with determination coefficients (R) higher than 0.9985. The limits of detection are in the range of 0.1-0.4 μg L. Recoveries from spiked real samples are between 83% and 114% with relative standard deviations between 1.6% and 7.8%. Graphical abstract Schematic presentation of the preparation of graphene oxide nanoribbons (GONRs) with multiwalled carbon nanotubes (MWCNTs), immobilization of GONRs into the pores of hollow fiber (HF), and application for solid/liquid phase microextraction (SLPME) of five bisphenol-type endocrine disrupting chemicals in three kinds of real samples.
一种新型的固/液微萃取（SLPME）技术被开发出来，并应用于同时测定五种双酚类内分泌干扰物（EDCs），包括双酚 A、双酚 S、双酚 F、双酚 B 和双酚 AF。该方法基于使用氧化石墨烯纳米带增强中空纤维（GONRs-HF）和 1-辛醇。GONRs 通过化学氧化从多壁碳纳米管（MWCNTs）中纵向解理，并进行了仔细的表征。GONRs 在表面活性剂的协助下分散在超纯水中，然后固定在 HF 的壁孔中。与 CNTs 相比，GONRs 的亲水性得到了提高，并形成了均匀的分散体。这简化了制备过程，减少了材料浪费。GONRs-HF 的孔和内腔充满了 1-辛醇，然后整个组件用于萃取分析物。与不同的萃取模式相比，GONRs-HF-SLPME 对五种双酚型 EDCs 具有更有效的萃取性能。响应面法用于优化影响萃取效率的实验参数。富集因子在 76 到 127 之间，具有良好的纤维间和批间重现性。该方法具有良好的线性关系，相关系数（R）均高于 0.9985。检测限在 0.1-0.4μg L 之间。从实际样品中加标回收的回收率在 83%-114%之间，相对标准偏差在 1.6%-7.8%之间。
