liquid chromatography science Articles

  • An Evaluation of Hydrogen as a Carrier Gas in Gas Chromatography: FREE Whitepaper

    Anthias Consulting has collaboratively written an application note on the use of hydrogen as a carrier gasfor the analysis and detection of pesticides in drinking water. The paper evaluates the use of an on-site generated hydrogen carrier gas vs. helium as the carrier gas for USEPA Method 551.1, which analyses the concentration of pesticides in drinking water by liquid-liquid ...


    By Anthias Consulting Ltd.

  • Peroxidase-mediated polymerization of 1-naphthol: impact of solution pH and ionic strength

    Received for publication September 24, 2008. Peroxidase-mediated oxidation has been proposed as a treatment method for naphthol-contaminated water. However, the impact of solution chemistry on naphthol polymerization and removal has not been documented. This research investigated the impact of pH and ionic strength on peroxidase-mediated removal of 1-naphthol in completely mixed batch reactors. ...

  • Ultra-trace arsenic speciation at Columbia Analytical

    Ultra-trace speciation of arsenic and other metals is performed using a variety of techniques tailored to the specific combination of species, matrix, and detection limits required. Currently, two analytical systems are applied: Ion Chromatography-Inductively Coupled Mass Spectrometry (IC-ICP-MS) and Hydride Generation-Cryogenic Gas Chromatography-Flame Atomic Absorption Spectrometry ...


  • The Advantages of a Targeted 2D LC Approach

    Webinar Highlights | Focus on the Relevant: The Advantages of a Targeted 2D Chromatography Approach Hi folks, I’m Daniel Root, Senior Product Marketing Manager for Multidimensional LC Systems at Waters. I recently conducted a webinar that addressed multidimensional liquid chromatography – an exceptional tool for the improvement of characterization and separation of ...


    By Waters Corporation

  • What is a Syringe Pump?

    A syringe pump is a type of infusion pump originally developed to help administer drugs to patients in a controlled manner. Early attempts to construct infusion pumps were made in the 19th century. However, the first infusion device was introduced in the 1950s to be used in chemotherapy. In the 1970s, the development of ambulatory infusion technology enabled the pumps to be used in research; ...


    By Chemyx Inc

  • Field-scale cleanup of atrazine and cyanazine contaminated soil with a combined chemical-biological approach

    A former agrichemical dealership in western Nebraska was suspected of having contaminated soil. Our objective was to characterize and remediate the contaminated site by a combined chemical-biological approach. This was accomplished by creating contour maps of the on-site contamination, placing the top 60 cm of contaminated soil in windrows and mixing with a mechanical high-speed mixer. ...

  • Determination of Phenanthrene in Urban Runoff of Tehran, Capital of Iran

    ABSTRACT In many big cities, surface runoff is collected by separate collection system and is then directed to receiving water bodies. Since it washes out the materials from the surface of different lands, is known as the source of pollution. Polycyclic aromatic hydrocarbons (PAHs) are one class of carcinogenic contaminants that are commonly found in storm water runoff. In this study, ...

  • Induction of lead-binding phytochelatins in vetiver grass [Vetiveria zizanioides (L.)]

    Received for publication July 9, 2008. Elevated lead (Pb) concentrations in residential houseyards around house walls painted with Pb-based pigments pose serious human health risks, especially to children. Vetiver grass (Vetiveria zizanioides L.) has shown promise for use in in situ Pb phytoremediation efforts. However, little is known about the biochemical mechanisms responsible for the observed ...

  • Field-scale cleanup of atrazine and cyanazine contaminated soil with a combined chemical-biological approach

    Received for publication August 12, 2008. A former agrichemical dealership in western Nebraska was suspected of having contaminated soil. Our objective was to characterize and remediate the contaminated site by a combined chemical-biological approach. This was accomplished by creating contour maps of the on-site contamination, placing the top 60 cm of contaminated soil in windrows and mixing with ...

  • In Beverly, the Shoe Fits for Bioanalysis!

    This past May, many of the nation’s leading bioanalysts gathered in New England to share ideas and explore the latest advances in mass spectrometry, liquid chromatography, and sample preparation for large molecule quantification. At Waters’ semi-annual bioanalysis workshop, scientists from across the U.S. trained on the latest mass spectrometry instrumentation at our demonstration ...


    By Waters Corporation

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