chromatography Articles

  • Chromatography Tips

    No.1 Gas Chromatography Tips  Our Founders and engineers of the company had accumulated more than 60 years experience in the research and development of HPLC instrumentation; HPLC column technology; mass spectrometer installation, training and services; chemical and biochemical separation, detection and quantification, Proteomics and cancer biomarker research and ...


    By AcuTech Scientific Inc.

  • New developments in chromatography

    Welcome to Chromatography News from Varian, Inc., our newsletter dedicated to letting you know what’s new in Chromatography and how it can help you achieve the best results in your analysis, in the fastest and most cost-effective way. This issue focuses on Varian’s high quality, stable, FactorFourTM (VF) capillary gas chromatography columns for the best results in GC. In response to demand from ...


  • Chromatography in Sugar Processing

    Untitled Document Chromatography is a new process to most sugar technologists, yet it is fast becoming a tool of significance for ...


    By Calgon Carbon Corporation

  • The productive environmental laboratory: BSK Labs boosts efficiency with Metrohm IC

    BSK Labs runs a number of environmental laboratories and service centers along the west coast of the US. A total of 70 employees – including microbiologists, chemists, lab technicians, and support staff – make sure that the 200 to 350 samples that come in every week are analyzed. BSK Labs specializes in potable water chemistry, ground water monitoring, storm water runoff, solid waste ...


    By Metrohm AG

  • Two Detector Solution to Analyzing Sulfur

    Sulfur compounds are reactive, corrosive to pipes, and destructive to catalysts in petroleum refineries. Sulfur emission are strictly regulated globally. When released into the atmosphere sulfur dioxide converts to sulfuric acid resulting in adverse effects on human health and the environment. Sulfur detection is found useful in many other industries; therefore, detection of sulfur compounds in ...


    By Restek Corporation

  • Webinar Highlights: Microfluidics for macromolecules

    Hi, I’m Jim Murphy, Principal Consulting Chemist at Waters, and I recently collaborated with Lucinda (Cohen) Hittle to present an exciting webinar on the use of microflow chromatography for macromolecules.  Lucinda, a Director of Discovery Bioanalytics at Merck, presented an overview of the use of LC-MS for peptide analysis along with various case studies for in vitro and in vivo ...


    By Waters Corporation

  • Hyphenated techniques as modern detection systems in ion chromatography

    Ion chromatography (IC) with conductivity detection has been successfully used to analyze low-molecular organic compounds such as amines and organic acids, as well as anionic and cationic substances. However, due to current toxicity concerns and the consequently lowered maximum contaminant levels (MCL), analyses in complex matrices require improved sensitivity and selectivity. The coupling of IC ...


    By Metrohm AG

  • Development of a novel odor measurement system using gas chromatography

    This paper describes a novel odor measurement system for creating arrays of virtual chemical sensors with nonoverlapping responses using ultrahigh-speed gas chromatography with a surface acoustic wave sensor (GC/SAW). This GC/SAW system provides high-resolution twodimensional olfactory images for easy recognition of many complex odors. Separation and quantification of the individual chemicals ...

  • The development of cation-exchange chromatography in free amino acids analysis

    Although it was not called a liquid chromatograph, the first such instrument was introduced in late 1959 by Beckman Instruments and was designated the M.S. Amino Acid Analyzer in honour of Moore and Stein. Inject valves had yet to be invented, the buffer switching valves were glass stopcocks and the column temperature was controlled by circulating water baths. Two positive displacement pumps ...


    By Pickering Laboratories, Inc.

  • Comparison of different anion-exchange chromatography resins for the purification of cyanobacterial microcystins

    For the first time, different types of diethylaminoethyl (DEAE) anion-exchange resins, widely used in previous studies, were investigated to determine the most effective resin for the purification of microcystins (MCs). MCs were extracted from freeze-dried Microcystis aeruginosa cells that had been harvested from the Bueng Nong Khot reservoir, Khon Kaen, Thailand. The toxins were precipitated ...


    By IWA Publishing

  • Demonstrating ultra-filtration and reverse osmosis performance using size exclusion chromatography

    Advanced water treatment plants employing ultrafiltration (UF) and reverse osmosis (RO) membrane processes are frequently implemented for the production of high-quality recycled water. It is important that process performance is able to be quantified and assessed to ensure it is fit for purpose. This research utilizes size exclusion chromatography with organic carbon, organic nitrogen and UV254 ...


    By IWA Publishing

  • High Resolution Detailed Hydrocarbon Analyses by Capillary Column Gas Chromatography

    In the petrochemical industry, samples such as petroleum naphthas and gasolines routinely must be quantitatively separated into their individual components.  Because these petroleum-derived samples consist of hundreds of compounds, petroleum analysts require chromatography columns that offer high resolution.  We have developed polar and nonpolar capillary gas chromatography columns to ...


    By Sigma-Aldrich Co., LLC

  • Determination of Sulfonamide Antibiotics in Wastewater by Liquid Chromatography – Tandem Mass Spectrometry

    Introduction Antibiotics are widely used in human and veterinary medicine for the prevention and treatment of bacterial infectious diseases. An important but often disregarded aspect of antibiotic use is the fate of antibiotic residues entering the environment. Pharmaceutical industry wastewater, improperly-disposed of unused antibiotics, and non-metabolized antibiotics excreted by humans can ...

  • 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.

  • Fouling potentials of polysaccharides in membrane bioreactors (MBRs) assessed by lectin affinity chromatography

    In this study, the fouling potentials of polysaccharides contained in mixed liquor suspension in a membrane bioreactor (MBR) treating municipal wastewater were investigated using lectin affinity chromatography. This investigation was carried out with different membranes to assess the effects of membrane materials on fouling potentials of polysaccharides. In lectin affinity chromatography, some ...


    By IWA Publishing

  • Increased throughput liquid chromatography and reduced solvent consumption for the determination of isoflavones by UHPLC

    All plant foods are complex mixtures of chemicals including both nutrients and biologically active non-nutrients, referred to as phytochemicals. Soy is known for having high concentrations of several physiologically-active phytochemicals, including isoflavones, phytate (inositol hexaphosphate), saponins, phytosterols and protease inhibitors. The isoflavones are what makes soy unique. Soy ...


    By PerkinElmer, Inc.

  • Chromatography plays its part in turning Science Fiction into Science Fact

    Tomek Bagiński’s short film Ambition picks up on a fundamental drive of human kind, a thirst for knowledge and understanding, a thirst that can be sated through projects like Rosetta which are turning science fiction into science fact: Ambition the film Rosetta is an ESA mission with contributions ...


    By Anthias Consulting Ltd.

  • High-Performance Liquid Chromatography for Determination of N-Nitrosodimethylamine in Water

    High-performance liquid chromatography (HPLC) was applied for aqueous determination of Nnitrosodimethylamine (NDMA). A fluorescence derivatization technique was adopted to enhance detection using HPLC. Derivatization with dansyl chloride was optimized for excitation and emission wavelengths (340 and 530 nm, respectively), pH (9-12), and concentration of dansyl chloride (500 mg/L). An instrumental ...

  • Low thermal mass gas chromatography – Analysis at MACH speed

    Gas Chromatography (GC and GC/MS) analysis has been the mainstay for the analysis of regulated organic contaminates in the environmental field. Numerous advancements have occurred in GC instrumentation that include improvements for injectors, detectors, automation, software, and GC column choices. Although many advancements have been made in GC technology, very little has changed for column oven ...


  • Opt for the easy way: Determining glycerol in biodiesel using ion chromatography

    Current US and European standards stipulate gas chromatography to determine the glycerol content in biodiesel. However, this method is both tedious and rather expensive. Metrohm recommends ion chromatography (IC) as a simple, cost-efficient and highly accurate ...


    By Metrohm AG

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