Cigarette filters as sorbent in solid phase extraction

By -

Cigarette filters (CFs) are employed to reduce the amount of smoke and toxic substances (tar and particulate matter) inhaled during smoking. Commercial filters usually consist on a large number of cellulose acetate fibers which act as particulate sieves as well as contaminant traps. The latter aspect, based on the chemical interaction of CFs with different organic substances, permits their use as sorptive phase in solid phase extraction (SPE). The first application of CFs in this context was published by Yan et al. in 2003 for the determination of traces of methylmercury by electrothermal atomic absorption spectrometry (ETAAS).


Recently, Chen et al. have employed CFs for the extraction of fluoroquinolone antibiotics from environmental waters. The authors described a polar or dipole-dipole interaction between the analytes and the oxygen functional groups of the CFs to explain the extraction of the targets. The enrichment factors obtained for the analytes, which were in the range from 483 to 562, highlight the sorptive capacity of the CFs that allows the extraction of large volumes of sample (up to 500mL).

Almost simultaneously, Fang et al. have reported the use of CFs for the extraction of organophosphorus and organochlorine pesticides in water and soil samples following a simple SPE procedure. For soil samples, a previous solid-liquid extraction is required before the SPE. Although the results for water samples are comparable to those obtained using conventional C18, CFs improve clearly the limits of detection when soil samples are processed.

For detailed information, the readers are referred to the original articles.

References
Link to article: Selective measurement of ultratrace methylmercury in fish by flow injection on-Line microcolumn displacement sorption preconcentration and separation coupled with electrothermal atomic absorption spectrometry.

Link to article: Cigarette filters as adsorbents of solid-phase extraction for determination of fluoroquinolone antibiotics in environmental water samples coupled with high-performance liquid chromatography

Link to article: Multi-residue determination of organophosphorus and organochlorine pesticides in environmental samples using solid-phase extraction with cigarette filter followed by gas chromatography–mass spectrometry

Comments

  1. UnknownOctober 1, 2012 at 5:02 AM

    Thanks for some other fantastic post. The place else may just anybody get that type of info in such an ideal means of writing? I have a presentation subsequent week, and I am at the look for such information.AGS Filtration Pvt. Ltd is a Native Indian organization of Worldwide reputation in the field of multiple demand and program Filtration. Liquid Filters.

    ReplyDelete

Post a Comment

Popular posts from this blog

Fabric phase sorptive extraction: a new generation green sample preparation strategy

By -
Image
by Dr. Abuzar Kabir, International Forensic Research Institute, Department of Chemistry and Biochemistry, Florida International University, Miami, Florida, USA Fabric phase sorptive extraction (FPSE), the most recent member of the sorptive microextraction family, has innovatively incorporated both solid phase microextraction (SPME) and solid phase extraction (SPE) techniques into a single technology platform. FPSE utilizes permeable natural/synthetic fabrics e.g., cotton, polyester, fiber glass supports to chemically bind sol-gel hybrid inorganic-inorganic sorbents. A 5 cm2unit of coated fabric (2.5 cm x 2.0 cm) is typically used as the extraction media which can be inserted directly into the sample container. Extraction of the analytes is generally expedited by using a magnetic stir bar to diffuse the analyts into the sample matrix so that rapid mass transfer from the sample matrix to the extraction medium takes place.Once the mass transfer equilibrium between the FPSE media and
Read more

Gold coated magnetic beads for electrochemical detection

By -
Image
This post summarizes an interesting article, recently accepted for publication in Analytical Chemistry, which presents an innovative use of magnetic beads. Researchers from the Osaka Prefecture University at Japan have proposed the synthesis of magnetic microbeads covered with a smooth gold layer that are used for the electrochemical detection of streptavidin (1). The synthesis, which is deeply described in the manuscript, consists of three well defined steps. First of all, the magnetic beads are introduced in a colloidal gold dispersion containing Au-nanoparticles (Au-NPs). Thanks to the opposite zeta potential of both materials (microbeads are negatively charged while Au-NPs present a positive charge), their assembly takes place by electrostatic interactions. However, the Au-NPs are not connected to each other and therefore the electrical resistance of the microbeads is too high. In a second step, the modified microbeads are dispersed in an aqueous medium containing HAuCl 4 as
Read more

Rotating Disk Sorptive Extraction

By -
Image
by Prof. Dr. Pablo Richter, Department of Inorganic and Analytical Chemistry, Faculty of Chemical and Pharmaceutical Sciences, University of Chile. The modern trends in analytical chemistry promote efficiency and green technology in sample preparation. In this context, our research team developed a new technique in 2009 that is capable of extracting pollutants from liquid samples on a rotating PTFE disk with one surface coated with an extraction phase [1]. The disk has embedded a miniature magnetic rod, which allows rotation. We have termed this procedure rotating-disk sorptive extraction (RDSE). RDSE is currently available in two configurations. In the classic version (Figure 1), the extraction phase is a polymeric film adhered to one side of the PTFE disk (configuration 1). In this configuration, polydimethylsiloxane (PDMS), nylon and octadecyl (C18) have been used as the sorptive material for the extraction of low-polarity analytes (Log Kow between 3 and 7) [1-12]. However
Read more