Exploration of metal-organic framework MOF-177 coated fibers for headspace solid-phase microextraction of polychlorinated biphenyls and polycyclic aromatic hydrocarbons.
Exploration of metal-organic framework MOF-177 coated fibers for headspace solid-phase microextraction of polychlorinated biphenyls and polycyclic aromatic hydrocarbons.
复制标题
DOI：
10.1016/j.talanta.2015.06.058
复制
发表时间：
2015-11
期刊：
影响因子：
6.1
通讯作者：
Guanhua Wang;Yong-qian Lei;Huacan Song
中科院分区：
文献类型：
--
作者：
Guanhua Wang;Yong-qian Lei;Huacan Song
金属有机骨架(MOF)因其具有较大的朗缪尔表面积和较高的热稳定性而受到分析科学的广泛关注。本文采用粘附法在腐蚀不锈钢表面制备了MOF-177涂层固相微萃取(SPME)纤维，并将其应用于环境水样中多氯联苯(PCB01、PCB05、PCB29、PCB47、PCB98、PCB154、PCB171、PCB201)和多环芳烃(Any、ANA、Flu、Phe、Ant、Flt、PYR)的富集。对影响萃取率的几个参数进行了优化，包括萃取温度和时间、解吸时间、搅拌速度和加盐量。结果表明，涂层光纤对多氯联苯和多环芳烃的检出限较低(L−1为0.69~4.42 ng)，重现性好，相对标准偏差为1.47%~8.67%。实际水样的加标回收率在81.8%~113%之间，L−1的加标浓度为10 ng。此外，MOF-177涂层纤维在100次萃取循环中具有足够的稳定性，在实验过程中对纤维对纤维的重现性的相对标准偏差小于9.82%。
Metal-organic frameworks (MOFs) have received much attention in analytical science for their large langmuir surface and high thermostability. Herein MOF-177-coated solid-phase micro-extraction (SPME) fibers were fabricated on etched stainless steel by an adhensive method, and applied to the enrichment of polychlorinated biphenyls (PCB01, PCB05, PCB29, PCB47, PCB98, PCB154, PCB171, PCB201) and polycyclic aromatic hydrocarbons (ANY, ANA, FLU, PHE, ANT, FLT, PYR) from environmental water samples. Several parameters affecting the extraction efficiency were optimized prior to the gas chromatography-mass spectrometry analysis, including extraction temperature and time, desorption time, stirring rate and salt addition. The results indicated that the coated fiber gave low detection limits (0.69–4.42 ng L−1) and good repeatability with the RSD ranging from 1.47% to 8.67% for PCBs and PAHs. The recoveries were between 81.8% and 113% with the spiked level of 10 ng L−1for the real water samples. Besides, the MOF-177 coated fiber was stable enough over 100 extraction cycles and the RSD for fiber-to- fiber reproducibility was less than 9.82% during the experiment.