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Gas Chromatography is an analysis technique that works effectively alongside other sensing technologies, delivering a highly sensitive measurement of the constituent components of a gas sample. It is utilized in our SERVOPRO Chroma, NanoChrome, and NanoChrome ULTRA analyzers.
Gas Chromatography (GC) separates out a mixture in the gas phase to determine the presence and concentration of constituent components. Under optimized conditions, it can measure down to parts-per-billion (ppb) levels, making it ideal for high purity control processes.
The components of a mixture in the gas phase are separated by introducing a small portion of the sample into a flowing carrier gas (mobile phase), which percolates through a stationary phase consisting of particulates packed within a column. The different gas constituents are separated due their own specific, adsorptive interaction between the stationary phase and the mobile phase. This causes the constituents to exit the column (elute) at different times.
These specific times are detected at the exit of the column. By comparing times, users can identify analytes by the order in which they exit from the column.
Each constituent concentration is determined, after calibration, from the integral of each analyte’s detector response over time.
The conditions under which GC technology operates differ for each application and require individual optimizations.
Gas Chromatography works alongside Plasma, FID and TCD technologies in our Chroma and NanoChrome analyzers. GC analyzers do not deliver real-time measurements, so they are unsuited to applications where rapidly changing gas concentrations must be monitored.
Air separation units
Measures multiple components down to ppb levels
Highly reliable results
Works for a wide range of background gases
High-purity processes that require accurate gas detection down to ppb levels, including electronic and medical gases, plus cryogenic air separation processes.
Learn more about all our gas analyzer solutions that use this sensor technology.
The Chroma is optimized to specific background gases to ensure optimum performance for your application.
Incorporating the latest advances in gas sensing and signal processing methodology, the NanoChrome revolutionizes ultra-trace purity measurements.
Using proven ultra-trace sensing, the NanoChrome ULTRA conquers the most stringent demands of the semiconductor industry, delivering a cost-effective solution compared to competing technologies.
Get a free copy of our special Expert Solutions magazine focusing on our complete range of sensing technologies. It’s available to download now.
If you still need guidance to find the best solution for your process, we’re here to help. Our expert team combines applications knowledge with extensive experience and deep understanding of the sensing technologies available. We’ll help you find the solution that meets your unique needs.