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.
The stainless steel bodies are approximately 300mm long and 23mm OD. They are designed for use at ambient temperature, and at pressures below 100psi.
