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Chromatography Applications

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    Monitoring of leaks in heat exchangers

    The Situation

    A California refinery produces xylene for use as commercial product and a precursor for petrochemical manufacturing. A primary component to the production of xylene is the isolation and purification of the chemical from a complex mixture of petroleum hydrocarbons. Steam based heat exchangers are used to process the xylene. Inherent to the design and rough duty heat exchangers face during their operation, leaks can and do develop. When a heat exchanger leaks, xylene contaminates the steam and produces a number of problems ranging from loss of final product, contamination and fouling of steam transfer piping, and ultimately bio-fouling of cooling towers. Consistent and reliable monitoring for xylene or other petroleum hydrocarbons in cooling water or steam condensate can alleviate product loss and process equipment down time.

    By Turner Designs Hydrocarbon Instruments, Inc. based in Fresno, CALIFORNIA (USA).

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    Analytical and measuring instruments of shimadzu cannabis testing solutions

    Shimadzu`s Cannabis Testing Solutions cover a broad range of applications, from potency testing to pesticide screening. We supply the instruments, methods and experience necessary to get you up and running quickly. Shimadzu scientific instruments have been applied to natural products, food sciences, pharmaceuticals and environmental testing for decades. Whether you are a chromatography expert or a novice, our platforms and training ensure that your laboratory will generate quality results from a wide variety of cannabis samples. Our easy to use platforms save you time and money, maximizing the profits of your laboratory. Shimadzu can help you with your QA/QC testing, peak harvesting analysis and cannabis research.

    By Shimadzu Scientific Instruments Inc based in Columbia, MARYLAND (USA).

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    Mass flow devices for analytical instrumentation

    Axetris mass flow devices are used in a variety of analytical applications: Gas Chromatography, Mass Spectrometry, Atomic Spectroscopy, Elemental Analysis, Thermal Analysis, Bioreactor and Fermentor.

    By Axetris Ag based in Kaegiswil, SWITZERLAND.

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    Analytical instruments for gas chromatography

    Gas Chromatography requires a stable repeatable flow of the carrier gas with negligible temperature drift. The Axetris MFC provides excellent control of the gas flow resulting in sharp peaks and high resolution of the chromatograms. Multiple calibrations allow the control of Helium, Hydrogen or Nitrogen. Due to the high turn down ratio of 1000:1 and more, a broad range of flows can be controlled.

    By Axetris Ag based in Kaegiswil, SWITZERLAND.

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    Gas analysis & monitoring systems for gas purity

    The purity of a gas is an indication of the amount of other gases contained in it. A high purity refers to a low amount of other gases. High purity gas are considered to be of better quality and are generally more expensive. The purity of the gas can be expressed as a percentage or as a decimal fraction. Applications for checking the purity of the gases across different industrial sectors by air separation plants, cryogenic facilities, the quality control of industrial gases to the steel mills, etc.

    By ETG Risorse e Tecnologia S.r.l. based in Montiglio, ITALY.

  • Chromatography systems for pharmaceutical industries

    Dikma has over 15 years of R&D experience in chromatographic columns which have been widely used by pharmaceutical manufacturers.

    By Dikma Technologies Inc. based in Lake Forest, CALIFORNIA (USA).

  • Increased Pigment Removal with Analysis of Pesticides in Oranges

    An application was developed to demonstrate increased pigment removal for the analysis of pesticides, using Supel™ QuE Z-Sep/C18 QuEChERS and an Ascentis® Express C18 HPLC Column. The improved cleanup can decrease column and instrument fouling, leading to extended LC column lifetime and reduced instrument downtime.

    By MilliporeSigma based in Bellefonte, PENNSYLVANIA (USA).

  • Percent Aromatics in Gasoline #3008

    The aromatic content of gasoline determines many of its combustion properties. Since it also impacts the environmental characteristics of the fuel it is desirable to have accurate measurements of this parameter. The traditional analytical method for measuring aromatics is either gas chromatography (GC) or an older method entitled fluorescent indicator adsorption (FIA), both of which are time and labor intensive. This note will discuss the use of Guided Wave hardware and software tools for the measurement of % aromatics in fuel products using fiber optic-based, Near-Infrared (NIR) spectroscopy. NIR can be applied in real time directly in process monitoring or as a laboratory procedure. In either case NIR is a time and money saving alternative to traditional methods. Request Application Note #3008

    By Guided Wave, Inc. based in Rancho Cordova, CALIFORNIA (USA).

  • Gas chromatography for laboratories

    By F-DGSi based in Evry Cedex, FRANCE.

  • Chromatography systems for food industries

    Food samples exhibit a challenge to analytical chemists to determine pesticide residues to meet food safety regulations in USA and EU. Therefore, more careful sample preparation is needed to successfully identify and quantify these compounds in food. Dikma offers SPE columns with different absorbent phases and QuEChERS method for sample pre-treament.

    By Dikma Technologies Inc. based in Lake Forest, CALIFORNIA (USA).

  • Liquid Chromatography for soil consultancy

    Everyone has a responsibility to care for the environment to reduce the levels of pollution, including businesses that daily release emissions into the air and the ground. This is why we provide a full-service environmental testing service to help businesses identify problems and resolve them so they operate in the most environmentally-friendly method possible. We offer air emission testing, emissions monitoring services and stack emissions testing to businesses of all sizes.

    By Custom Stack Analysis, LLC. based in Alliance, OHIO (USA).

  • Chromatography gas analysis for air test

    By Buck Scientific Inc based in East Norwalk, CONNECTICUT (USA).

  • Determination of Additives in Beverages using Ascentis Express Columns

    Beverages, such as sodas and energy drinks, can include a number of polar ingredients, which are easily soluble in the water matrix of the drinks. These ingredients include sweeteners (sugars and sugar substitutes), caffeine, vitamin supplements, amino acids, organic acids, and plant extracts. Because the analytes are already in solution, there is no need for extensive sample preparation. Dilution followed by direct injection into an HPLC is typically suitable. In this article we present two beverage applications using Ascentis Express HPLC columns. Ascentis Express columns offer faster HPLC on any system. One benefit is their ability to produce the resolution, efficiency, and speed on conventional HPLC systems that is associated with the use of sub-2 micron columns on a UHPLC system, without generating high backpressure. Column chemistries (RP-Amide and HILIC) were selected for this article based on their enhanced performance with polar compounds in comparison to C18.

    By MilliporeSigma based in Bellefonte, PENNSYLVANIA (USA).

  • Chromatography systems for environmental monitoring

    With the growth of contamination generated from agricultural and industrial production, it causes a threat to the enviroment including drinking water, atmosphere and soil. The chemists have always seeked out the effective analytical methods to detect and identify chemical contaminants. Dikma provides innovative products and application solutions according to government regulations and industry standards, for air and water quality monitoring, gas detection.

    By Dikma Technologies Inc. based in Lake Forest, CALIFORNIA (USA).

  • Chromatography systems for petrochemical industries

    The measurement of permanent gases, light hydrocarbons, sulfur compouds etc. in petrochemicals is important to petrochemical industry. Dikma offers a full range of products to measure these basic parameters.

    By Dikma Technologies Inc. based in Lake Forest, CALIFORNIA (USA).

  • Improved Reproducibility and Reduced Sample Preparation Time for the HPLC Analysis of Aflatoxins in Raw Peanut Paste

    The US FDA and international regulatory agencies have set contamination levels for aflatoxins in animal feedstuffs. Since Aspergillus may infect commodities pre-harvest, during storage or during processing, monitoring for aflatoxins in associated agricultural commodities at all stages of production is requisite. Field screening methods exist that are adequate to estimate contamination levels for aflatoxins. When additional confirmation or quantification is desired, chromatographic laboratory analysis is often necessary. Preparation of matrix samples prior to chromatographic analysis typically requires extraction and purification. Commonly, immunoaffinity columns (IAC), which employ a multi-step bind and elute mechanism to concentrate and purify aflatoxins, are used to purify matrix samples for subsequent analysis. Solid phase extraction (SPE), an alternate method which may use interference removal, can also be employed.

    By MilliporeSigma based in Bellefonte, PENNSYLVANIA (USA).

  • Analysis of Isocyanates Using the ASSET™ EZ4-NCO Dry Sampler

    Isocyanates are used as a raw material to produce a number of products . Personal exposure can occur while the products made with isocyanates are being applied, or when the materials are removed by grinding or thermal degradation. Workers who are exposed to these compounds are at risk for respiratory disorders and asthma. The highly reactive nature of the isocyanate compounds and the low occupational exposure limits put high demands on both sampling and analytical techniques for monitoring of isocyanates in air. We investigated the performance of the LC-MS and LC-MS-MS methods in the analysis of isocyanates using the new ASSET™ EZ4-NCO Dry Sampler. We found that the analytical method can successfully reach the quantitation limit for most isocyanates of 5 ng/mL in the final sample when LC-MS-MS analysis was used and the quantitation limit of 10 ng/mL when LC-MS analysis was used. All 11 compounds were well-resolved chromatographically using a 15 cm Ascentis Express C18 column.

    By MilliporeSigma based in Bellefonte, PENNSYLVANIA (USA).

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