Department of Chemistry, Lorestan University, Khoramabad, Iran. payman
Anal Chim Acta. 2011 Jun 10;695(1-2):58-62. doi: 10.1016/j.aca.2011.03.037. Epub 2011 Apr 14.
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 7 min, 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.
CMK-3 介孔碳被制备并作为高度有序的碳骨架的高多孔纤维涂层进行了表征，用于固相微萃取 (SPME)。纳米材料被固定在铂、不锈钢和铜金属丝上，用于制备新的 SPME 纤维。铜-CMK-3 纤维表现出优越的性能，因此与 GC-MS 结合用于提取一些酚类化合物。为了优化萃取条件，使用了单纯形优化方法。选择的条件为：样品体积 13ml，萃取温度 56°C，萃取时间 7min，超声时间 5.5min，pH5 和盐浓度 8.9%。所选纤维对极性酚类化合物具有一定的选择性，其萃取效率优于商业 PDMS 纤维。该纤维获得了线性校准曲线，相关系数均大于 0.99，检测限范围为 0.002 至 0.068μgmL(-1)。新的 SPME 纤维的萃取效率在至少 40 次萃取中没有明显变化。该纤维成功用于天然水样中酚类化合物的测定。
