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Gas Chromatography Applications

  • 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).

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    Reduced Fat Interference with Analysis of Pesticides in Avocados

    QuEChERS (Quick, Easy, Cheap, Effective, Rugged, Safe) is a very popular method for the extraction and cleanup of fruit and vegetable samples for pesticide residue analysis.2-4 The extraction step uses acetonitrile and a salting out effect (with MgSO4). Cleanup is then accomplished using dispersive SPE (dSPE) followed by a centrifuge step prior to analysis. This application shows the clean-up and analysis using Supel™ QuE Z-Sep+ QuEChERS and an SLB®-5ms GC column.

    By Sigma-Aldrich Co., LLC based in Bellefonte, PENNSYLVANIA (USA).

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    Gas analyzers and detectors for the ethanol processing

    Gas chromatographs and hydrocarbon analyzers can be key in adding value to the ethanol production process and protecting the environment from Volatile Organic Compound (VOC)emissions created during the process.

    By MOCON, Inc. - Baseline based in Lyons, COLORADO (USA).

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    PTR-MS systems for biological research

    Real-time measurement of plant defense and leaf wounding reactions. Measurement of VOCs in dynamic biological systems with low detection limit and without sample preparation.

    By Ionicon Analytik Ges.m.b.H. based in Innsbruck, AUSTRIA.

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    Measurement of C1-C5 with carbon dioxide for oil & gas exploration.

    The PetroAlert Model 8900 combines the selectivity of gas chromatography with the sensitivity, broad dynamic range, and hydrocarbon selectivity of a flame ionization detector (FID) providing fast analysis of C1-C5 hydrocarbons and Carbon Dioxide required in Mud Logging for Oil & Gas exploration. The PetroAlert Model 8900 uses a dual column configuration with timed backflush to vent which is used to strip off moisture and C6+ hydrocarbons. A pre-cut column is used in series with the analytical column. At sample injection a fixed sample volume is carried to the pre-cut column. Backflush of the pre-cut column is timed from sample injection so that only C1-C5 hydrocarbons are eluted from the pre-cut column to the analytical column. C6+ hydrocarbons on the pre-cut column are then vented. Then a third column is used in conjunction with a second 10-port valve for individual analysis of methane. C1-C5 hydrocarbons are separated on the analytical column and elute to the flame ionization detector (FID) for analysis.

    By MOCON, Inc. - Baseline based in Lyons, COLORADO (USA).

  • Chromatography gas analysis for air test

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

  • Gas chromatography for laboratories

    By F-DGSi based in Evry Cedex, FRANCE.

  • 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).

  • X-ray fluorescence XRF analysis for environmental protection and waste management

    To meet the requirements of new regulations and to protect the environment effectively, industries need techniques that enable the analysis of elements at lowest concentration levels. Bruker X-ray fluorescence (XRF) analysis is the most suitable analytical technique for handling different kinds of materials. Bruker’s XRF, ICP-MS, GC, TOF-MS, FT-IR, CBRNE products and applications help you to monitor contaminated land efficiently and quickly, to determine hazardous elements in the air and water, as well as to classify waste material and to specify products for recycling and disposal. Whether solids, sludge, filters, liquids or powders: there is a fast and simple sample preparation technique for every material type.

    By Bruker Corporation based in Billerica, MASSACHUSETTS (USA).

  • Alkane (hydrocarbon) gas measurement for mudlogging in oil & gas drilling rigs

    The need for operator and maintainance intensive gas chromatograph (GC) analyzers was eliminated. Customer can now deploy all-optical, unattended sensor system for monitoring the composition of hydrocarbon gases (C1-C5) exiting the well bore which provides crucial information about the drilling formation that would save time and money.

    By MKS Instruments, Inc. based in Andover, MASSACHUSETTS (USA).

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    Analysis of Pesticides in Beef Kidney

    The suitability of the new cleanup sorbent, Supel QuE Z-Sep+, has been successfully demonstrated for cleanup of beef kidney matrix. It was found to effectively reduce background without significantly reducing recovery of lipophilic pesticides such as organochlorines and some pyrethroids. GC-MS full-scan data indicated Z-Sep+ was found to provide better cleanup in the form of reduced background than PSA/C18, and less interference in the GC-MS/SIM analysis of the target pesticides themselves.

    By Sigma-Aldrich Co., LLC based in Bellefonte, PENNSYLVANIA (USA).

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    Machine condition monitoring for labs & services

    Overview

    Machine condition monitoring using oil analysis is widely practiced by virtually every segment of modern industry that maintains large, expensive, oil-lubricated machines. In many cases, especially in smaller plants or enterprises, samples are sent to commercial oil analysis laboratories that can help monitor machinery health.

    By Spectro Scientific based in Chelmsford, MASSACHUSETTS (USA).

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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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    Flow meters for the general research flow solutions

    Our instruments are widely used by original equipment manufacturers of gas chromatographs, mixing and blending systems and other pieces of analytical equipment. The mulitple gas capability and wide choice of flow controlllers-for high pressure, very low flows and corrosive gases-offer customers excellent application flexibility.

    By Sierra Instruments, Inc. based in Monterey, CALIFORNIA (USA).

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    Flow meters for analytical flow solutions

    Gas mass flow controllers are widely used in gas chromatographs in order to control carrier gases and to precision purge these instruments. Our instruments also find use in custom gas mixing and blending systems for environmental research.

    By Sierra Instruments, Inc. based in Monterey, CALIFORNIA (USA).

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    Analysis of VOC compounds in water by Purge & Trap or dynamic headspace

    Context & Challenges Volatile organic compounds (VOC) can be dissolved in water. Sometimes water is polluted and to study contamination of VOC in finished drinking water, VOC must be measured. Chromatotec® Solutions Chromatotec® has developed a specific system for the measurement of VOC in water: a Purge & Trap system, the airmoPURGE. The analyzer is coupled with a degasing system allowing the extraction of dissolved gases. The complete system is based on: - 502.2 method from US EPA – “Volatile organic compounds in water by purge and trap capillary column gas chromatography with photoionization and electrolytic conductivity detectors in series – Revision 2.1”. - 524.2 method from US EPA – “Measurement of purgeable organic compounds in water by capillary column gas chromatography/mass spectrometry – Revision 4.0”.

    By Chromatotec Group based in Val de Virvée, FRANCE.

  • Measurement solution for FTIR Vs. GC in gas analysis

    Comparison of Technologies

    A gas chromatograph (GC) has traditionally been the technology of choice for laboratory analysis of gas samples. GCs have been used for over 50 years in the qualification and quantification of complex mixtures of gases. The techniques and methodology required to run GCs are often a pre-requisite for any laboratory technician. Recent developments in Fourier Transform Infra-Red (FTIR) gas analysis has enabled this technology to start to replace GCs in the lab.

    By Protea Limited based in Middlewich, UNITED KINGDOM.

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    odor control for asphalt

    Control Asphalt Odors Naturally: The production of hot mix paving asphalt generates odors that can be strong, persistent, and a nuisance to employees and neighbors alike. Controlling and abating these odors can be a challenge.

    By OMI Industries (OMI) based in Long Grove, ILLINOIS (USA).

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    Measurement of ethylene oxide for monitoring workplace exposure limits

    The Series 8900 Ethylene Oxide Analyzer combines the selectivity of gas chromatography with the sensitivity of a Photoionization Detector (PID) providing interference free response to Ethylene Oxide (EtO) at levels below 0.05 ppm. This analytical method is referenced in OSHA`s `Occupational Exposure to Ethylene Oxide: Final Standard` 29 CFR Part 1910. The system documents exposure levels including: time-weighted averages (TWA), short-term exposure limits (STEL) and instantaneous alarms. Areas that are typically monitored include; EtO Sources - gas storage areas, sterilizer doors, aeration doors, and the General Work Area - decontamination, packaging and preparation and sterile product storage areas.

    By MOCON, Inc. - Baseline based in Lyons, COLORADO (USA).

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