To prevent spontaneous breakage, coil the line leading to and from the purifiers to relieve strain and isolate instrument vibrations. If hydrocarbon contamination is suspected, install a hydrocarbon trap between the moisture and oxygen traps. A moisture trap can also be used on the FID air line or the ECD make-up gas line to eliminate noisy, rolling baselines when operating at high detector sensitivities. If purifiers are installed system-wide, a leaky fitting downstream of the trap could allow oxygen and moisture to enter the gas stream and degrade column performance. Install purifiers as closely as possible to the GC's bulkhead fitting, not system-wide. When using multiple filters in series, we suggest installing a moisture trap in front of the oxygen trap because moisture reacts with most oxygen traps. Detector gases, such as hydrogen and compressed air, should be free of water and hydrocarbons or excessive baseline noise can result.
Make-up gas should also be contaminant free or baseline fluctuations and excessive detector noise can occur. These purifiers can be installed in-line or using a quick-install baseplate system. We recommend using a Super Clean carrier gas cleaning kit on carrier gas lines because this single trap will remove moisture, hydrocarbons, and oxygen, eliminating the need to install multiple traps. Gas purifiers are available for specific types of contamination (moisture, hydrocarbon, or oxygen) or as a combination of filters that provides broader protection. The expense of using high-purity gases in combination with carrier gas purifiers will be offset by longer column lifetime and less instrument maintenance along with better instrument sensitivity. Contaminants cause ghost peaks to appear during temperature programming and degrade the quality of analytical data.
Carrier gases must contain less than 1 ppm of oxygen, water vapor, or any other trace contaminant to prevent column degradation, shortened column lifetime, and increased stationary phase bleed. Gas purification is essential for good chromatographic results. ASE Extraction System Parts Cross-Reference.Documentation Search (SDS, Certs, Data Packs).EZGC Method Translator & Flow Calculator.
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