European Greenhouse Gas Chromatograph (GC) System

Global warming and pollution are making greenhouse gas analysis increasingly more important. The Greenhouse Gas GC is designed for the separation and detection of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O).

Our European Greenhouse Gas Chromatograph system is fitted with a FID with built-in methanizer and an ECD allowing detection of greenhouse gases with only one injection. The sample is introduced in to a 10 -port gas sampling valve fitted with two sample loops (in the range 0.01-5ml), either manually using a syringe or automatically by vacuum pump (a 220V pump interface is included). Each sample loop corresponds to two separate carrier gas streams and columns, a 3m Hayesep D packed column to the FID-Methanizer and a second 3m Hayesep D column to the ECD.

The system comes with a built in air compressor, including two traps to remove contaminants, so an external compressed air supply is not required. We can also supply hydrogen generators. Please ask us for more details!

Hydrogen Generators

The Greenhouse Gas Chromatograph is not limited to CO2, CH4 and N2O detection. The FID-Methanizer also allows detection of CO and hydrocarbons. As well as N2O, the sensitive ECD responds to electronegative compounds, especially chlorinated, fluorinated or brominated molecules, for example PCBs and pesticides. Fitted with a low-volume sample loop, the Greenhouse Gas GC can be used to measure gases produced by bacterial metabolic processed.

Both 10-Port-Valves are working in the same way – plumbing is the same.

There are two different positions of the 10-Port-Valve - “Load-Position” and “Inject-Position”. First draw shows the “Load-Position”. In this position the sample will be flushed on both sample loops with one injection by syringe or sampler. The run is started by pressing “Start Run” or a remote start signal from the autosampler. All relays are controlled by software.

After you start to run - both valves rotate to the “Inject-Position” - you can see in the second drawing that now the sample loops are switched into the carrier gas stream. The sample passes through the pre-column and main column. Water is retained by the pre-column longer than CH4, CO2 and N2O. Before the water leaves the pre-column, - both 10-Ports-Valves are switched back to the “Load-Position” (Figure 1) and at same time Relay “A” will open a solenoid valve to backflush the water to vent. Now the flow direction in the pre-column is changed. In this time all the other compounds are on the main columns on the way to the detectors.