Gas Chromatography (GC), Micro-GC, GC/MS
Gas Chromatography is a standard analytical method to separate gas mixtures and characterized the gases qualitatively and quantitatively. The method uses chromatographic columns to separate gas mixtures into individual components and then detects the components with a variety of detectors. The methods could use tradition gas chromatographs with packed or capillary columns (analysis time on the order of minutes) or micro gas chromatographs (analysis time on the order of seconds). Traditional separation of “permanent gases” (N2, O2, He, Ar, H2) is achieved on a molecular sieve type column, CO2 and low molecular weight hydrocarbons on a Pora Q type column and light weight volatile organics on a OV-1 or polysilane packed/lined column. Detectors can range from generic component responsive units such as a TCD or PID to molecular characterization detectors such as a Mass Spectrometer. Multiple combinations of GC and detectors can be used. This method has a large quantitiative range from percent to parts per million (ppm) levels.
- Thermal Desorption/GC/MS
- GCMate (high resolution MS) exact mass measurement
Headspace gas analysis
Agilent 7694 headspace sampler with GC/MS interface detects and measures volatile organic compounds in liquid or solid samples via static headspace gas chromatography.
- Canister sampling and gas analysis
- Solid Phase Microextraction (SPME) gas analysis