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ABJ’s gas panels provide convenient control and purification of laboratory gases. These panels are supplied with valves, gauges, regulators, purifiers, and fittings that make installing and maintaining gas purifiers easier. These wall mount design conserves bench top space and allows you to easily view the status of your gas system. Panels can be used as individual stations or grouped together to form a gas control centre for the entire lab. Each panel is ready to connect to ¼” O.D gas lines. |
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Why Use Gas Purifiers? |
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A clean gas stream helps guarantee the quality of your GC analysis and the reliability of your results. It also helps prolong column life and minimize detector noise. Gas purifiers act as an insurance policy, protecting your instrumentation and analytical columns from these contaminants. |
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How contaminants affect your Gas stream? |
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Follow the path that your carrier gas or detector fuel gases take to get to the GC. They start at either a gas tank or a gas generator, and travel through long lengths of tubing, pressure gauges, various fittings, and valves. Each is a potential culprit for introducing contaminants into your gas stream, which ultimately degrades chromatography results and shortens column life. Typical contaminants, such as moisture, oxygen, and hydrocarbons wreak havoc with GC columns and detectors. Capillary and packed columns can degrade when exposed to moisture or oxygen, particularly at high temperatures. Detectors performance may also be compromised. |
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Choosing the right Gas Purifier for your application. |
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There are a variety of gas purifiers available. Some remove a specific contaminant while others remove multiple contaminants from your gas stream. There are several factors you need to consider when selecting purifiers for your application. These include contaminants potentially present in your gas stream, gas purity levels required, flow and pressure limitations, space availability, and desired convenience when replacing spent traps.
Moisture, hydrocarbon, and oxygen traps are the most commonly used purifiers for GC applications. |
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Moisture Traps: |
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Moisture traps are typically packed with molecular sieves. After extensive heating, these crystalline structures lose their water of hydration opening a cavity that is readily filled with any compound that can fit. Water fits perfectly. However, it will also remove HCL, CO2, SO2, Cl2, or any other gas with effective diameter smaller than water. |
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Hydrocarbon Traps: |
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Hydrocarbon traps are packed with an activated charcoal that adsorbs any organic compound larger than methane. Size and molecular weight of the organic contaminants will greatly affect the capacity of the trap, and to a smaller degree, trap efficiency. Activated charcoal has a higher capacity for larger (>C4) hydrocarbons than for smaller hydrocarbons. |
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Oxygen (Oxy) Traps: |
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This S.S.316, high capacity oxygen trap employs a time proven oxygen scavenging materials technology. A high surface area reduced metal is used to irreversibly bind any free oxygen present in the gas. It reduces Oxygen & Moisture level below 1 ppm from Standard lab gases. Oxygen traps are packed with a metal catalyst. Oxygen is the most detrimental contaminant to analytical columns. It produces irreversible oxidation damage particularly to polar stationary phases. |
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