Process Gas Chromatograph GC8000

I. Working Principle

• It operates based on the fundamental principle of gas chromatography. The sample gas is first injected into the instrument. Inside the GC8000, the gas mixture travels through a stationary phase, which is typically packed in a column. Different components in the gas sample have different affinities for the stationary phase and the mobile phase (usually an inert carrier gas like helium or nitrogen). As the gas moves through the column under controlled temperature and pressure conditions, the various components separate based on their different retention times. These separated components then exit the column and are detected by a detector, which generates signals corresponding to the concentration of each component.

II. Technical Specifications

• Column Options: The GC8000 offers a wide variety of column choices to accommodate different types of gas samples and separation requirements. There are packed columns for general-purpose separations and capillary columns for more precise and high-resolution analysis. The columns can be selected based on factors such as the polarity of the analytes, the complexity of the gas mixture, and the desired separation efficiency.

• Detector Types: It is equipped with multiple detector options. For example, the Flame Ionization Detector (FID) is commonly used for detecting organic compounds as it responds to hydrocarbons by ionizing them in a hydrogen flame and measuring the resulting ions. The Thermal Conductivity Detector (TCD) can detect a broad range of gases based on differences in thermal conductivity between the sample gas and the carrier gas. Additionally, there may be other specialized detectors like the Electron Capture Detector (ECD) for detecting electronegative substances or the Flame Photometric Detector (FPD) for sulfur and phosphorus-containing compounds, depending on specific application needs.

• Sampling System: The sampling system of the GC8000 is designed to handle process gases accurately and safely. It can be connected to pipelines or sample collection points in industrial processes. The system ensures that the gas sample is introduced into the instrument in a consistent and representative manner, with features such as flow control, pressure regulation, and sample conditioning (if necessary) to avoid any artifacts or inaccuracies in the analysis.

• Analysis Speed: It offers relatively fast analysis times. Depending on the complexity of the gas sample and the chosen analysis method, a single analysis cycle can typically be completed within a few minutes to tens of minutes. This enables timely monitoring of process gas compositions in industrial operations where quick results are essential for process control and decision-making.