Gamonchuang Jirasak, Burakham Rodjana
Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.
Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.
J Chromatogr A. 2021 Apr 26;1643:462071. doi: 10.1016/j.chroma.2021.462071. Epub 2021 Mar 15.
Mixed iron hydroxides (MIHs) modified with different amino-based polymeric materials, including aminopropyltriethoxysilane, polydopamine, diaminobenzoic acid, polyaniline, and polyphenylenediamine, were comparatively investigated as sorbents for the extraction of phenol compounds. Polyphenylenediamine-modified mixed iron hydroxides (MIH@PPDA) showed high adsorption capability for most target analytes. Its ferromagnetic behavior, with a magnetization of 17.38 emu g, was sufficient for subsequent use in magnetic solid-phase extraction (MSPE). The functional groups, morphology, and magnetic properties of this magnetic nanomaterial were investigated using Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, vibrating sample magnetometry, X-ray diffraction, and CHN analysis. High-performance liquid chromatography with a photodiode array detector was used to quantify phenol compounds. The experimental parameters affecting the efficiency of the entire MSPE process were optimized. Good linearity in the range of 0.5-1000 µg L was obtained (depended on the compound). The detection and quantitation limits varied from 0.01 to 0.3 µg L and 0.03 to 0.9 µg L, respectively. The enrichment factors for all phenol compounds were in the range of 80-285. The precision in terms of intra- and inter-day relative standard deviations were below 5.8% and 6.2%, respectively. The developed MSPE method was applied to analyze phenol compounds in diverse samples, including soil, drinking water, and fruit. Relative recoveries of 76.7-130.1% were obtained. The MIH@PPDA magneto-polymeric sorbent exhibits good stability and is reliable for a variety of phenol compounds.
对用不同氨基聚合物材料改性的混合氢氧化铁（MIHs）进行了比较研究，这些材料包括氨丙基三乙氧基硅烷、聚多巴胺、二氨基苯甲酸、聚苯胺和聚苯二胺，用作萃取酚类化合物的吸附剂。聚苯二胺改性的混合氢氧化铁（MIH@PPDA）对大多数目标分析物表现出高吸附能力。其铁磁行为，磁化强度为每克17.38电磁单位，足以用于后续的磁性固相萃取（MSPE）。使用傅里叶变换红外光谱、扫描电子显微镜、透射电子显微镜、振动样品磁强计、X射线衍射和CHN分析研究了这种磁性纳米材料的官能团、形态和磁性。使用配备光电二极管阵列检测器的高效液相色谱法定量酚类化合物。优化了影响整个MSPE过程效率的实验参数。在0.5 - 1000μg/L范围内获得了良好的线性关系（取决于化合物）。检测限和定量限分别在0.01至0.3μg/L和0.03至0.9μg/L之间变化。所有酚类化合物的富集因子在80 - 285范围内。日内和日间相对标准偏差方面的精密度分别低于5.8%和6.2%。所开发的MSPE方法应用于分析包括土壤、饮用水和水果在内的各种样品中的酚类化合物。获得了76.7 - 130.1%的相对回收率。MIH@PPDA磁性聚合物吸附剂表现出良好的稳定性，对多种酚类化合物可靠。
