capillary gc column Articles

  • Capillary GC Columns for Analysis of BTEX Hydrocarbons

    A number of different stationary phases have been used for analyzing benzene, toluene, ethylbenzene, and xylene hydrocarbons (the BTEX) compounds). Capillary columns based on a nonpolar shape-selective phase, a chiral stationary phase, and a polyalkylene glycol phase, and support coated open tubular columns (SCOT), exhibit differing abilities to resolve these compounds. A Bentone ...


    By MilliporeSigma

  • Environmental Applications Performed Using Equity Capillary GC columns

    Various Environmental Applications performed on the Supelco® Equity line of capillary GC columns; specifically the 100% poly(dimethylsiloxane) and poly(5% diphenyl.95% dimethylpolysiloxane) phases.  Applications include the following; USEPA Method 8270 for semivolatile compounds; USEPA Method 8081 for chlorinated pesticides; USEPA Method 8082 for polychlorinated biphenyls; diesel fuel; ...


    By MilliporeSigma

  • Evaluations of Polar and Highly Polar Ionic Liquid Capillary GC Columns with Environmental Samples

    Ionic liquids are a class of non-molecular ionic solvents with low melting points.  These liquids are unique combinations of cations and anions and can provide a variety of different selectivities when used as stationary phases in capillary gas chromatography.  A number of ionic liquid phases have been evaluated and characterized for selectivity and determined to be polar or highly ...


    By MilliporeSigma

  • Monitor Sulfur Compounds in Petroleum Chemical, Environmental, and Other Samples, Using a Special-Purpose Capillary GC Column

    Measurement of sulfur compounds is important to petroleum chemical analysts for several reasons, including a need to monitor odor problems and prevent catalyst poisoning.  Quantification of sulfur compounds is also important to environment analysts and to food, beverage and fragrance analysts for similar reasons.  Analyses of sulfur compounds can be complicated by the inability to ...


    By MilliporeSigma

  • Capillary GC Analyses of Chlorinated Pesticides in Dry Pet Food

    Based on federal and state regulations for identifying and quantifying low levels of pesticides in food and environmental samples, we selected three capillary columns to screen for chlorinated pesticides. A nonpolar and two low/intermediate polarity phases were chosen to evaluate differences  in component elution order and retention times. Low level screening analyses were performed ...


    By MilliporeSigma

  • Capillary GC Analyses of Triazine Pesticides in Dry Pet Food

    Based on federal and state regulations for identifying and quantifying low levels of pesticides in food and environmental samples, we selected three capillary columns to screen for triazine pesticides. A nonpolar and two low/intermediate polar phases were chosen to evaluate differences in component elution order and retention times. Low level screening analyses were performed effectively by using ...


    By MilliporeSigma

  • Monitor Organophosphorus Pesticides in Air, Using ORBO-49P Tubes and Capillary GC

    A sampling tube containing Supelpak-20 resin and a glass fiber filter effectively adsorbs and releases five organophosphorous pesticides (chlorpyrifos, diazinon, dichlorvos, malathion, parathion) in vapor or aerosol form in air.  At a sampling rate of 1L/min, 8 hour samples can be taken for all of these pesticides except malathion.  Short term (15 min) samples can be taken at the same ...


    By MilliporeSigma

  • Fast Screening for Chlorinated Pesticides, Using Solid Phase Microextraction (SPME) and Capillary GC

    Fast analysis of environmental samples increases throughput in the lab and is highly desirable for quick turnaround screening methods used in the field or prior to GC/MS analysis. Solid phase microextraction is a fast, solventless alternative to conventional sample extraction techniques. In SPME, analytes establish an equilibrium between the sample matrix and a stationary phase coated on a fused ...


    By MilliporeSigma

  • Monitor BTEX Compounds and Fuels in Water, Using Solid Phase Microextraction and Capillary GC

    BTEX compounds, kerosene, diesel fuel, or gasoline in water or aqueous suspensions of soil can be monitored by solid phase microextraction (SPME) and capillary GC on a short, narrow bore column (15mx 0.20mm ID).   A sample can be extracted and analyzed in less than 40 minutes.   Because no solvent is required, sensitive detection id scharacteristic of SPME/GC analyses.   ...


    By MilliporeSigma

  • GC Analyses of Polynuclear Aromatic Hydrocarbons

    Polynuclear aromatic hydrocarbons (PAHs) can be separated by packed column or capillary column gas chromatography. An SPB-5 bonded phase fused silica capillary  column separates the 16 PAHs considered priority pollutants in wastewater by the US Pal SP-301, a liquid crystal stationary phase in packed GC columns, resolves benzo(e)pyrene and benzo(a)pyrene. This publication discusses ...


    By MilliporeSigma

  • GC Determination of Benzene in Reformulated Gasoline using a Supelco SLB-IL111 Ionic Liquid Column

    The amount of benzene in gasoline is a concern because it is a known human carcinogen, and exposure to it has been linked to detrimental health effects.  The challenge with the analysis lies in the complex composition of gasoline, which consists of hundreds of different compounds.  This application shows the separation of benzene and other gasoline compounds using a 60 m x 0.25 mm I.D., ...


    By MilliporeSigma

  • Target GC-MS Analysis using Accelerated Column Heating and Interactive Deconvolution Software

    In diverse fields ranging from environmental samples to complex fl avor preparations, high performance, high resolution capillary gas chromatography/mass spectrometry, GC-MS, has become the preferred technique for identifying and quantifying target compounds at trace levels. Many of these samples are characterized by very complex matrices, which provide a substantial challenge for contemporary ...


  • EPA Method 8270D Analysis Using Narrow-bore GC Columns and Fast Data Acquisition with a Quadrupole GCMS System

    Analytical support of environmental programs has been conducted for several decades using standard-bore capillary columns (0.25mmid) and quadrupole GCMS systems. Depending on method conditions and program requirements, the QC measures can consume a significant portion of a 12-hour shift, leaving less time for analysis of real-world samples. Typical cycle times (time from beginning of a run to the ...

  • Validation of USEPA Method 524.2 Using a Stratum PTC, AQUATek 100 Autosampler, and Perkin-Elmer Clarus 600 GC/MS

    The US EPA developed Method 524.2¹, “Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry”, for identifying and measuring purgeable volatile organic compounds (VOC) in surface water, groundwater, and drinking water. Due to the required sensitivity of this method, the use of purge and trap gas chromatography is vital. This ...


    By Teledyne Tekmar

  • Determination of VOCs in water using static headspace GC/MS with simultaneous full scan and selective ion recording

    The combination of static headspace sample introduction and gas chromatography/mass spectrometry (HS/GC/MS) provides the analyst with a powerful, fully automated technique for the determination of trace volatile organic compounds (VOCs) in water. Samples may be hermetically sealed in the headspace vial at the point of sampling. This approach avoids errors due to glassware cross-contamination and ...


    By PerkinElmer, 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 ...


  • US EPA Method 515 Chlorinated Acids on Equity-1701

    The potential health effects associated with many chlorinated acid herbicides has led to regulations regarding their use. US EPA method 515 describes the GC/ECD analysis of these compounds as their methyl ester derivatives in ground and drinking water, and lists a 1701-type capillary for use as a secondary column. In this application, 15 out of the 16 herbicides listed in method 515 were resolved ...


    By MilliporeSigma

  • Fast Analysis of Environmental Samples, Using Solid-Phase Microextraction (SPME)

    Solid Phase MicroExtraction (SPME) is an alternative to conventional sample extraction techniques. In SPME, analytes establish an equilibrium between the sample matrix and a stationary phase coated on a fused silica fiber (Figure A). The fiber is thermally desorbed in the injection port of the GC, which transfers the analytes into the capillary column. Because no solvent is injected, and the ...


    By MilliporeSigma

  • 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.

  • Application of gas chromatography-mass spectrometry preceded by solvent extraction to determine volatile fatty acids in wastewater of municipal, animal farm and landfill origin

    This study describes extraction of selected volatile fatty acids (VFAs) (containing from 2 up to 8 carbon atoms) with methyl-tert-butyl ether (MTBE) from polluted aqueous samples followed by separation, identification and quantification by gas chromatography coupled with mass spectrometry (GC-MS). Extraction parameters such as time and number of extractions, volume ratio, effect of acidification ...


    By IWA Publishing

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