7 Gas Selection and Plumbing
Filters and traps
52 Site Preparation Guide
Filters and traps
Using chromatographic-grade gases ensures that the gas in your system is pure. However, for
optimum sensitivity, install high-quality filters or traps to remove traces of water or other
contaminants. After installing a filter, check the gas supply lines for leaks.
Agilent recommends the Gas Clean Filter system. The Gas Clean Filter system delivers high
purity gases to your analytical instruments, reducing the risk of column damage, sensitivity
loss, and instrument downtime. The filters are designed for use with the GC, GC/MS, ICP-OES,
ICP-MS, LC/MS, and any other analysis instrument using carrier gas. Six filters are available,
including CO2, oxygen, moisture, and organics trap (charcoal).
Filter types
Each Gas Clean Filter type is designed to filter out a specific impurity that may exist in the gas
supply. The following filter types are available:
•Oxygen - Prevents oxidation of the GC column, septum, liner, and glass wool.
•Moisture - Delivers fast stabilization times for increased GC productivity, and prevents
hydrolization damage to the stationary phase, column, liner, glass wool, or septum in the
GC.
• Process Moisture - Prevents oxidation of GC components and is safe to use with acetylene
in process GC applications.
•Charcoal - Removes organic compounds and ensures correct performance of FID
detectors in the GC.
•GC/MS - Delivers fast stabilization times for increased GC productivity, removes oxygen,
moisture, and hydrocarbons from the carrier gas for MS applications, and provides
ultimate GC column protection.
Table 26 lists the most common Gas Clean Filter system kits. See the Agilent online store or
contact your local Agilent sales representative for additional filters, parts, and accessories
applicable to your instrument configuration.
Table 25 Parts for adapting NPT fittings
Description Part number
Swagelok 1/8-inch to female 1/4-inch NPT, brass 0100-0118
Swagelok 1/4-inch to female 1/4-inch NPT, brass 0100-0119
Reducing union, 1/4-inch to 1/8-inch, brass, 2/pk 5180-4131
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