Ordered Nanoporous Carbon-Based SPME and Determination by GC

Abstract

CMK-1 (carbon mesoporous from Korea) type ordered nanoporous carbon was investigated as a novel solid-phase microextraction fiber for the first time. The microextraction process was coupled with GC-FID and used to extract benzene, toluene, ethylbenzene and xylenes (BTEX) from the head space of the solution samples. Prepared fibers featured advantages like easy and fast preparation, high thermal and mechanical stability in which a fiber could be used for more than 60 tests. Employing Taguchi method and orthogonal array design; OA 16 (4 5 ), the HS-SPME of BTEX was optimized. Under the optimized conditions for all BTEX components, the linearity was from 3 to 800 lg L -1 , the relative standard deviation (RSD%) of the method was between 4.2 and 9.4% and limit of detections was between 0.27 and 1.1 lg L -1 . The recovery values were from 87.1 to 106.2% in water samples. Finally, the applicability of the proposed method was evaluated by the extraction and determination of BTEX in the water and petrochemical samples.

Enhanced hydrogen sorption on modified MIL-101 with Pt/CMK-3 by hydrogen spillover effect

“…Among various carbon materials, the OMC has attracted considerable interest for this purpose. Thus, CMK-3 was chosen as the ideal candidate supports material, because it possesses large surface area, high chemical stability, uniform pore diameters accessible porosity and three-dimensional conducting network [27][28][29]. The present work reports the synthesis, the structural characterization and the hydrogen sorption properties of both the metal-organic framework MIL-101(Cr) and the modified material formed by generation of Pt/CMK-3 catalyst and Carbon Bridge in MIL-101.…”

Ordered mesoporous carbon film as an effective solid-phase microextraction coating for determination of benzene series from aqueous media

“…Additionally, vigorous stirring could cause the contact of liquid sample and fiber. The variation of the fiber position [40] or the contact of liquid sample and fiber [41] are responsible for the decrease of extraction efficiency. Therefore, for the following experiments, the agitation rate was fixed at 900 rpm.…”

Ordered mesoporous carbon/Nafion as a versatile and selective solid-phase microextraction coating

“…The aforementioned unique characteristics of OMC make it an ideal candidate to be used as SPME coating material. A few works have reported the preparation of OMC using SBA-15 or MCM-48 as the template and used as SPME coatings with good extraction efficiency [37][38][39]. However, to our knowledge, reports on characterization of these OMCs-based SPME coatings in terms of the property, morphology and extraction selectivity are very scarce, if any.…”