Category: Chromatography

Detectors

The thermal conductivity detector is considered a universal detector. It will detect any component that has a thermal conductivity different from the carrier gas. Helium is the most frequently used carrier gas. It has greater thermal conductivity than any other component except hydrogen. The thermal conductivity detector is a heated wire filament or thermistor bead. […]

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Column Selection

The column has been called the heart of the chromatographic system. It separates the components of interest from the rest of the sample. Column selection, installation and setup can be as much an art as a science. The first approach should be to review industry standards for an appropriate method. Others in the industry may […]

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The Product Stream and Components of Interest

The first step in selecting a chromatograph system is to identify the product stream and the components of interest. This vital step frequently gets skipped or receives too little attention. “Typical” samples must be analyzed for every identifiable and significant component. One spot sample will usually not be enough. Consideration should be made of all […]

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Natural Gas and Natural Gas Liquid Chromatography

To properly install a chromatograph system, the following must be considered: • Product Stream • Analytical Components of Interest • The Analytical Method • Carrier Gas • Sample Preparation • Introducing the Sample into the Chromatograph • Column Selection • Detectors • Detector Signal Integration and Data Handling • Safety Considerations (ventilation, area classification, etc.) […]

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