fused silica capillary 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 Sigma-Aldrich Co., LLC

  • Lower Detection Limits with Ground-Breaking Column Technology

    Rxi technology unifies outstanding inertness, low bleed, and high reproducibility into a single high performance column line. Take variation out of the equation and get the most consistent results for trace-level analysis with Rxi columns. phases available Rxi-1ms Rxi-1HT Rxi-5ms Rxi-5Sil MS Rxi-5HT Rxi-XLB ...


    By Restek Corporation

  • 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 Sigma-Aldrich Co., LLC

  • 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 Sigma-Aldrich Co., LLC

  • 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 Sigma-Aldrich Co., LLC

  • Is Microflow LC a Reality or Perception?

    Microflow or nanoflow chromatography has been used mostly in the academic and fundamental research environment in the past for its various advantages over analytical liquid chromatography, but rarely in the industrial settings. This is most likely because many of us believe it is a pain-in-the-neck technique to perform! But is this a reality or just a ...


    By Waters Corporation

  • Texas Instruments - A Novel Separation Technique for the Analysis of Trace Levels of Atmospheric Contaminants in Inert Semiconductor Process Gases

    A NOVEL SEPARATION TECHNIQUE FOR THE ANALYSIS OF TRACELEVELS OF ATMOSPHERIC CONTAMINANTS IN INERTSEMICONDUCTOR PROCESS GASES J. Scott McWilliams, Alan Johnson, Charlene Long, Jeremiah D. Hogan*Texas Instruments, Inc.Dallas, TX 75265 Low ppb detection limits for contamination in cylinder gases have been achieved with gas chromatography using a modified gas ...


    By Environics, Inc.

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