Facile modification of multi-walled carbon nanotubes–polymeric ionic liquids-coated solid-phase microextraction fibers by on-fiber anion exchange
Facile modification of multi-walled carbon nanotubes–polymeric ionic liquids-coated solid-phase microextraction fibers by on-fiber anion exchange
复制标题
通过纤维上阴离子交换对多壁碳纳米管-聚合物离子液体涂覆的固相微萃取纤维进行轻松改性
DOI：
10.1016/j.chroma.2015.03.022
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发表时间：
2015
影响因子：
4.1
通讯作者：
Chuannan Luo
中科院分区：
文献类型：
--
作者：
Juanjuan Feng;Min Sun;Yanan Bu;Chuannan Luo
原位阴离子交换已被证明是一种快速改性聚合物离子液体（pil）基固定相的有效方法。在这项工作中，利用纤维上阴离子交换工艺来调整多壁碳纳米管(MWCNTs)-聚（1-乙烯基-3-辛基咪唑溴）（聚（VOIm+Br−））-包被固相微萃取（SPME）纤维的萃取性能。首先通过逐层制备方法将MWCNTs涂覆在不锈钢丝上，然后将pil物理涂覆在MWCNTs上。通过纤维间阴离子交换，MWCNTs-poly （VOIm+Br−）纤维的阴离子转化为双（三氟甲烷磺酰）亚胺（NTf2−）和2-萘磺酸盐（NapSO3−）。耦合气相色谱法，MWCNTs-poly （VOIm+Br−）纤维对亲水性和供氢键醇具有良好的提取效率，检出限（lod）在0.005 ~ 0.05 μ mL−1范围内；与NTf2−进行阴离子交换后，得到的MWCNTs-poly （VOIm+NTf2−）纤维对疏水性烷烃的线性范围较宽，相关系数(R)在0.994 ~ 0.997之间；芳香型NapSO3−阴离子增强了纤维的芳香族性能，对邻苯二甲酸酯类和卤代芳烃有足够的萃取能力。最后应用MWCNTs-poly （VOIm+NapSO3−）纤维测定了工业园区地下水中的几种卤代芳烃。
In situ anion exchange has been proved to be an efficient method for facile modification of polymeric ionic liquids (PILs)-based stationary phases. In this work, an on-fiber anion exchange process was utilized to tune the extraction performance of a multi-walled carbon nanotubes (MWCNTs)-poly(1-vinyl-3-octylimidazolium bromide) (poly(VOIm+Br−))-coated solid-phase microextraction (SPME) fiber. MWCNTs were first coated onto the stainless steel wire through a layer-by-layer fabrication method and then the PILs were coated onto the MWCNTs physically. Anion of the MWCNTs–poly(VOIm+Br−) fiber was changed into bis(triflroromethanesulfonyl)imide (NTf2−) and 2-naphthalene-sulfonate (NapSO3−) by on-fiber anion exchange. Coupled to gas chromatography, the MWCNTs–poly(VOIm+Br−) fiber showed acceptable extraction efficiency for hydrophilic and hydrogen-bonding-donating alcohols, with limits of detection (LODs) in the range of 0.005–0.05 μg mL−1; after the anion exchange with NTf2−, the obtained MWCNTs–poly(VOIm+NTf2−) fiber brought wide linear ranges for hydrophobicn-alkanes with correlation coefficient (R) ranging from 0.994 to 0.997; aromatic property of the fiber was enhanced by aromatic NapSO3−anions to get sufficient extraction capacity for phthalate esters and halogenated aromatic hydrocarbons. The MWCNTs–poly(VOIm+NapSO3−) fiber was finally applied to determine several halogenated aromatic hydrocarbons in groundwater of industrial park.