Eugene F. Barry, Robert L. Grob

Columns for Gas Chromatography (eBook, PDF)

Performance and Selection

• Format: PDF

Produktbeschreibung

Choosing the right column is key in Gas Chromatography Gas Chromatography (GC) is the most widely used method for separating and analyzing a wide variety of organic compounds and gases. There have been many recent advancements in both packed column and capillary column GC. With numerous options and considerations, selecting the right column can be complicated. This resource provides essential guidance for scientists and technicians, including: * Methods of choosing both capillary and packed columns * Selection of dimensions (column length, I.D., film thickness, etc.) and type of column * Guidelines for proper connections of the column to the injector and detector * United States Pharmacopeia and National Formulary chromatographic methods * ASTM, EPA, NIOSH, and OSHA column selection specifications * Information on the advantages of computer assistance in GC and multidimensional GC * Comprehensive information on column oven temperature control Columns for Gas Chromatography: Performance and Selection is a hands-on reference for scientists and technicians using GC.

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Produktdetails

• Verlag: John Wiley & Sons
• Seitenzahl: 336
• Erscheinungstermin: 22. August 2007
• Englisch
• ISBN-13: 9780470114179
• Artikelnr.: 37290421

Autorenporträt

Eugene F. Barry, PHD, is Professor of Chemistry and Head of the Chemistry Department at the University of Massachusetts Lowell and a recipient of the school's Most Outstanding Teacher Award. He is coeditor of Modern Practice of Gas Chromatography, Fourth Edition (Wiley), the standard reference for the industry. Dr. Barry is author or coauthor of over 100 publications and has several patents. The late Robert L. Grob, PHD, was Professor Emeritus of Analytical Chemistry at Villanova University and a consultant in analytical and environmental chemistry. He coauthored Environmental Problem-Solving Using Gas and Liquid Chromatography and authored Chromatographic Analysis of the Environment, now in its third edition. Dr. Grob published over 250 research publications and held one patent. He was the recipient of the Stephen Dal Nogare Award in Chromatography, the EAS Award in Separation Science, and numerous other awards.

Inhaltsangabe

Preface. Acknowledgments. 1 Introduction. 1.1 Evolution of Gas
Chromatographic Columns. 1.2 Central Role Played by the Column. 1.3
Justification for Column Selection and Care. 1.4 Literature on Gas
Chromatographic Columns. 1.5 Gas Chromatographic Resources on the Internet.
References. 2 Packed Column Gas Chromatography. 2.1 Introduction. 2.2 Solid
Supports and Adsorbents. Supports for Gas-Liquid Chromatography. Adsorbents
for Gas-Solid Chromatography. 2.3 Stationary Phases. Requirements of a
Stationary Phase. USP Designation of Stationary Phases. Kovats Retention
Index. McReynolds and Rohrschneider Classifications of Stationary Phases.
Evaluation of Column Operation. Optimization of Packed Column Separations.
2.4 Column Preparation. Coating Methods. Tubing Materials and Dimensions.
Glass Wool Plugs and Column Fittings. Filling the Column. Conditioning the
Column and Column Care. 2.5 United States Pharmacopeia and National
Formulary Chromatographic Methods. References. 3 Capillary Column Gas
Chromatography. 3.1 Introduction. Significance and Impact of Capillary Gas
Chromatography. Chronology of Achievements in Capillary Gas Chromatography.
Comparison of Packed and Capillary Columns. 3.2 Capillary Column
Technology. Capillary Column Materials. Fused Silica and Other Glasses.
Extrusion of a Fused-Silica Capillary Column. Aluminum-Clad Fused-Silica
Capillary Columns. Fused-Silica-Lined Stainless Steel Capillary Columns.
3.3 Preparation of Fused-Silica Capillary Columns. Silanol Deactivation
Procedures. Static Coating of Capillary Columns. Capillary Cages. Test
Mixtures for Monitoring Column Performance. Diagnostic Role Played by
Components of Test Mixtures. 3.4 Chromatographic Performance of Capillary
Columns. Golay Equation Versus the van Deemter Expression. Choice of
Carrier Gas. Measurement of Linear Velocity and Flow Rate. Effect of
Carrier Gas Viscosity on Linear Velocity. Phase Ratio. Coating Efficiency.
3.5 Stationary-Phase Selection for Capillary Gas Chromatography.
Requirements. History. Comparison of Columns from Manufacturers.
Polysiloxane Phases. Polyethylene Glycol Phases. Cross-Linked Versus
Chemically Bonded Phase. Chemical Bonding. MS-Grade Phases Versus
Polysilarylene or Polysilphenylene Phases. Sol-Gel Stationary Phases.
Phenylpolycarborane-Siloxane Phases. 3.6 Specialty Columns. EPA Methods.
Chiral Stationary Phases. Gas-Solid Adsorption Capillary Columns: PLOT
Columns. 3.7 Capillary Column Selection. Practical Considerations of Column
Diameter, Film Thickness, and Column Length. Capillary Columns of 0.53mm
i.d.: Megabore Columns. Correlation of Column Dimensions and Film Thickness
with Parameters in the Fundamental Resolution Equation. Column Selection
for Gas Chromatography by Specifications. 3.8 Column Installation and Care.
Carrier Gas Purifiers. Ferrule Materials and Fittings. Column Installation.
Column Conditioning. Column Bleed. Retention Gap and Guard Columns. Column
Fatigue and Regeneration. 3.9 Special Gas Chromatographic Techniques.
Simulated Distillation. Multidimensional Gas Chromatography. Computer
Modeling of Stationary Phases. References. 4 Column Oven Temperature
Control. 4.1 Thermal Performance Variables and Electronic Considerations.
4.2 Advantages of Temperature Programming over Isothermal Operation. 4.3
Oven Temperature Profiles for Programmed-Temperature Gas Chromatography.
4.4 Role of Computer Assistance in Optimizing Separations in Gas
Chromatography. DryLab (LC Resources). ProezGC (Restek Corporation). GC-SOS
(Chem SW). 4.5 Fast or High-Speed Gas Chromatography. Selectivity Tuning.
Resistively Heated Columns and Column Jackets. 4.6 Subambient Oven
Temperature Control. References. Selected References. Appendix A: Guide to
Selection of Packed Columns. Appendix B: Column Selection. Index.

Rezensionen

"...a practical resource for scientists and technicians..." (Journal of the American Chemical Society, August 15, 2007)

"This book provides the necessary guidance for column selection and type of column chosen with the injection system and detectors in mind." (International Journal of Environmental and Analytical Chemistry, January 2008)

"A very useful book for chromatographers and researchers." (CHOICE, September 2007)

"...a practical resource for scientists and technicians..." (Journal of the American Chemical Society, August 15, 2007)