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首页> 外文期刊>Analytica chimica acta >CMK-3 nanoporous carbon as a new fiber coating for solid-phase microextraction coupled to gas chromatography-mass spectrometry
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CMK-3 nanoporous carbon as a new fiber coating for solid-phase microextraction coupled to gas chromatography-mass spectrometry

机译：CMK-3纳米多孔碳作为固相微萃取与气相色谱-质谱联用的新型纤维涂层

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摘要

CMK-3 nanoporous carbon was prepared and characterized as a highly porous fiber coating, with a highly ordered carbon framework, for solid-phase microextraction (SPME). The nanomaterial was immobilized onto platinum, stainless steel and copper metal wires for preparation of new SPME fibers. The copper-CMK-3 fiber showed superior properties and therefore was applied for extraction of some phenolic compounds in combination with GC-MS. For optimization of the extraction conditions, a simplex optimization method was used. The selected conditions were: sample volume 13 ml, extraction temperature 56 °C, extraction time 7min, ultrasonic time 5.5 min, pH 5 and salt concentration 8.9%. The selected fiber showed some selectivity towards the polar phenolic compounds and its extraction efficiency was better than a commercial PDMS fiber. Linear calibration curves with correlation coefficients better than 0.99 and detection limits in the range from 0.002 to 0.068 μg mL~(-1) were obtained for the fiber. No significant change was observed in the extraction efficiency of the new SPME fiber over at least 40 extractions. The fiber was successfully used for the determination of phenolic compounds in natural water samples.
机译：制备了CMK-3纳米多孔碳，并将其表征为具有高度有序碳骨架的高度多孔纤维涂层，用于固相微萃取（SPME）。将纳米材料固定在铂，不锈钢和铜金属线上，以制备新的SPME纤维。铜-CMK-3纤维表现出优异的性能，因此与GC-MS结合用于提取某些酚类化合物。为了优化提取条件，使用了单纯形优化方法。选择的条件为：样品体积13 ml，萃取温度56°C，萃取时间7min，超声时间5.5min，pH 5和盐浓度8.9％。所选纤维对极性酚类化合物表现出一定的选择性，其提取效率优于市售PDMS纤维。获得了相关系数优于0.99，检测限在0.002至0.068μgmL〜（-1）范围内的线性校准曲线。在至少40次萃取中，新SPME纤维的萃取效率未见明显变化。该纤维已成功用于测定天然水样品中的酚类化合物。

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