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Working to Automate Micro-Extraction


I am a regular reader of this blog, which I find relevant and interesting, so I am pleased to have this opportunity to introduce the Anatune blog to a wider audience and encourage more people to read it.
Anatune is a company based in Cambridge, UK and we specialise in the automation of GC-MS sample preparation and injection. We provide upgrades to existing instruments, but best of all, we like to deliver complete, integrated systems where the sample preparation works seamlessly with GC-MS. (Read more)

Stir bar sorptive dispersive microextraction mediated by magnetic nanoparticles


We all are familiar with stir bar sorptive extraction (SBSE) and dispersive methodologies in this context. The advantages of both techniques are also well known and a deep research is being carried out to characterize new sorbent phases which improve the efficiency and open up the application field of these microextraction techniques.
Research teams from the University of Valencia at Spain and Ioannina at Greece have joined their deep knowledge in dispersive techniques to bring us a very elegant combination of stir bar sorptive dispersive microextraction mediated by magnetic nanoparticles (SBSEDµE). (Read more)

Highlighted articles (November 12, 2014)


Read the highlighted articles at this link

Rotating Disk Sorptive Extraction


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). (Read more)

Microextraction in cancer research

 

I have already arrived home after an interesting meeting in Madeira island regarding the HCV project dedicated to the study and characterization of human cancer volatome. The identification of biomarkers in several biological specimens is really essential since it will allow the development of analytical platforms for early detection of cancer or to study the disease progression. In this context, microextraction techniques can be used in two different scenarios. On the one hand, they can be used in the preliminary research to isolate potential candidates as biomarkers from several samples including urine or breath. On the other hand, once selected the appropriate candidates, microextraction techniques can be used to design screening and/or confirmation analytical methodologies for real-world tests. (Read more)

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



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.... (Read more)

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Gold coated magnetic beads for electrochemical detection

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

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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...
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Rotating Disk Sorptive Extraction

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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...
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