GC Gas Purifiers

Performance Characteristics of SGE Purifiers

Moisture Purifiers
Under laboratory temperatures and flows normally associated with GC carrier gases ie. less than 1L/min, these purifiers can be expected to reduce the moisture in a high purity gas stream to less than 10ppb and under these conditions are expected to absorb about 12g of H2O.

Hydrocarbon Traps
The capacity depends on the overall molecular weight of the contamination. Typically at 1L/min, C4 hydrocarbons should be less than 15ppb.

Oxygen Scrubbers
At flows of 1L/min, or less, of high purity gas (hydrogen, helium, and nitrogen) at laboratory temperatures, these scrubbers are expected to produce carrier gas containing less than 15ppb of oxygen. They can also remove small amounts of water without affecting the oxygen capacity. When used in conjunction with an indicating oxygen trap (GF-IOT), the oxygen content at the GC can be as low as 2ppb.

Which Purifier?
As a minimum requirement for capillary gas chromatography, especially for a new GC, SGE recommends the kit connected as shown, consisting of four gas purifiers to remove moisture, contaminating organic substances and oxygen. 

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