Gas Clean Filters
For chromatography, ICP, and TOC
Delivering clean gases for
accurate analyses
Enhanced gas quality for maximum productivity
The Agilent Gas Clean Filter System delivers clean gases, reducing the risks of column damage, sensitivity loss, and instrument downtime.
Contaminants in gases can significantly affect your analysis. Oxygen, hydrocarbons, and moisture can cause loss of sensitivity and accuracy of the GC and damage your column. Impurities activate glass wool in liners and accelerate septa degradation, causing high background signals and ghost peaks and leading to time-consuming troubleshooting. Oxygen in the supply gas for  ICP-OES or IC
P-MS can cause plasma shut-down and loss of sensitivity. Carbon dioxide in supply gas for TOC analyzers causes elevated baselines and loss of sensitivity and accuracy.Supply gases can pick up contaminants from every part of the gas line. You therefore need a Gas Clean Filter System even if your supply gas is of the highest quality – it is not economical to buy expensive, high purity gases if their quality is downgraded by impurities in the gas line.
Examples of the Gas Clean Filter range, showing the 4-position connecting unit  for ease of operation.
Agilent introduces a range of Gas Clean Filters  and related components:
GC/MS Filter  – provides faster stabilization times to reduce gas consumption (see Figure 1)
Moisture Filter  – delivers faster stabilization times for increased productivity in GC
Process Moisture Filter and connecting unit  – designed for use with acetylene in process GC
Carbon Dioxide Filter  – eliminating CO 2 from supply gas, to minimize loss of sensitivity and improve accuracy in TOC
High flow connection unit  – for applications up to 20 L/min, including
ICP-OES, ICP-MS, and LC/MS
Fast stabilization and replacement
李崇霄妻子个人资料
Fast, leak-free filter replacement for superb performance
Every Gas Clean Filter features a unique connection design that permits easy filter replacement. The connecting unit shown in
Figure 3 allows the instrument to remain under pressure during filter changeover and prevents air from entering the system. Changing a Gas Clean Filter is easy, requiring no tools or gas shut-off, unli
ke in-line filters.
The Technischer Überwachungs-Verein (TÜV*) certificate**  assures safe use up to 15 bar (217 psi). A TÜV certificate at this level is unique to our design and guarantees the highest quality of Gas Clean Filters.
* TÜV NORD Group has expertise in technical safety, environmental protection, and the conformity assessment of management systems and products – nationally and internationally.  ** Certificate number 973/980538 hel-CHROMP1.doc.Fast replacement斯巴达克斯男主角
Reduced impurities for improved analysis
Inserting a Gas Clean Filter System in the gas line immediately before the instrument inlet greatly reduces the level of impurities, thus improving trace analysis (see Figure 2). Contaminants entering your GC column will also be reduced, which is critical for high temperature analysis and essential for longer column lifetime.
Figure 3. The unique connection design allows fast, leak-free replacement of the Gas Clean Filter.
Fast stabilization
Figure 1. Shows the fast stabilization rate (the N 2 mass measured by mass
spectrometry) of a GC/MS after replacement of the filter.
Figure 2. Shows the difference in bleed levels of two GC columns due to moisture exposure with and without a filter when running a temperature program (50 °C to 350 °C, 20 °C/min). When no filter is used, an extreme rise in the bleed profile is clearly visible due to moisture in the carrier gas. By using Gas Clean Filters, a normal
bleed profile is achieved with the removal of all moisture in the carrier gas.
Highest performance
Gas Clean Filter indicators are more sensitive
Replacing the filters when they have reached absorption capacity
ensures maximum protection of your GC columns and analytical
hardware. The sensitive indicators change color, alerting you that
the filter needs to be replaced.
In Figure 4, the open-topped glass tube on the left contains the
Gas Clean moisture indicator (green) packed below another
manufacturer’s indicator (yellow). On the right is the same tube
after exposure to air at room temperature with average moisture
content. As the moisture penetrated the tube downwards, it passed
through the other manufacturer’s indicator before it reached the
Gas Clean indicator at the bottom. The tube on the right shows that
林峰潘
the Gas Clean indicator changed color from green to pale brown,
冰雪战歌网下载revealing the presence of moisture. However, the other indicator
failed to change color, confirming that the Gas Clean moisture
indicator is a great deal more sensitive.
With the Gas Clean Filter System, you can be completely confident that your gas supply contains less than 0.1 ppm of moisture.
The system will not suffer from hydrolization damage, saving
you expense and needless downtime in replacing degraded components. Our moisture filters offer unsurpassed protection against moisture contamination for your GC system. Economical, with immediate payback
A Gas Clean Filter System allows you to use 99.996% (4.6) pure helium instead of the more expensive 99.999% (5.0) or 99.9999% (6.0) grade, while still yielding high quality analytical results.  Figure 5 compares the costs of carrier gas with the use of helium 4.6 and 6.0. The expected cost savings are 30%.
The Gas Clean Filter System, in combination with 4.6 grade helium, delivers at least the same quality gas to your GC and GC/MS as using 6.0 grade helium with respect to oxygen and water. This presents considerable savings over the use of higher quality helium.Figure 4. Shows how Gas Clean filter indicators are extremely sensitive to moisture. After exposure, the Gas Clean indicator in tube 2 changes color before another manufacturer’s indicator has barely begun to react.
After 24 hours of
exposure to ambient
air, the more sensitive
Gas Clean indicator歌唱二小放牛郎歌曲
turns pale brown even
before the competitor’s
indicator turns clear.
After 24 hours of
exposure to ambient
air, the competitor’s
indicator is only just
begining to show
moisture retention.
12终极另类
Test tube containing a
competitor’s indicator
(yellow) and the Gas
Clean indicator (green)
at the start of the
experiment.
Figure 5. Shows the cost savings in helium provided by the Gas Clean Filter System
when using 4.6 grade rather than 6.0 grade helium.
A full range of filters
Six different filters are available. Each fast-stabilizing absorbent is packed in a transparent and virtually unbreakable, heavy-walled polycarbonate housing. Our full range offers you:
• A GC/MS Filter that delivers faster stabilization times for lower gas consumption and faster set-up time. The single filter unit with a combination of filters removes oxygen, moisture, and hydrocarbons from carrier gas for MS applications.
• A Moisture Filter that also delivers faster stabilization times for increased productivity in GC. Water removal prevents needless hydrolization damage to the stationary phase, fused silica surface, glass wool, or septum.
• An Oxygen Filter that prevents oxidation of the liquid stationary phase, septum, or glass wool in GC.
• A Process Moisture Filter, process connecting units, and male connectors, free from any brass and copper, for safe use with acetylene in process GC.
• A Charcoal Filter that removes organic compounds and ensures correct performance of FID detectors in GC.
• A new Carbon Dioxide Filter that eliminates CO
2 from supply gas.
When combined with a Moisture Filter, it is ideal for zero-air gas generators.
Improvements to the absorbance materials in the GC/MS and Moisture Filters mean that they stabilize more quickly to reduce downtime and improve productivity. We have also introduced a high flow connection unit that handles flow rates up to 20 L/min for collision gas applications, supply gas for ICP and ICP-MS, or any application where high flows are required, expanding the range of applications you can run. For operations requiring flows above
10 L/min, you can save money by using cheaper gas and by eliminating contaminants. Each Gas Clean Filter is compatible with both the high flow and standard connection units.
All GC applications benefit from the use of Gas Clean Filters, whether your GC is connected to an FID or MS or to any other type of detector, such as flame photometric, thermal conductivity, electron
capture, nitrogen-phosphorous, or thermoionic. Modular design for easy mounting
The Gas Clean Filter System consists of two key parts: the connecting unit and the filters. The connecting unit has inlet and outlet connectors for the gas lines, and the system can be wall-mounted or fixed to a bench. Connecting units come with a 1, 2, or 4 filter capacity and are available for 1/4 in. or 1/8 in. gas lines. Contact your local Agilent representative for the filter sets applicable to your GC configuration.
The right filter for every gas
Filter selection guide