Ammonia, Anhydrous (CAS Number 7664-41-7)
Anhydrous Ammonia gas is highly toxic. Inhalation may cause irritation to eyes and
throat and may cause pulmonary edema, which can result in serious injury or death.
Repeated exposure to Anhydrous Ammonia may cause permanent lung damage.
•
Refer to Material Safety Data Sheet (MSDS) for Anhydrous Ammonia for
exposure control/personal protection, handling/storage, accidental release,
first aid, and fire fighting measure requirements.
•
Anhydrous Ammonia should only be used in conjunction with an appropriate
ventilation system for the instrument, the exhaust from the foreline pump, and
the gas cylinder. Use appropriate safety shutoff valves for the Anhydrous
Ammonia supply and interconnecting lines.
The operator is responsible for determining and implementing appropriate precautions
when using Anhydrous Ammonia and for compliance with all governmental
regulations. It is the operator's responsibility to understand and adhere to all safe
laboratory practices concerning the use of toxic gases, including Anhydrous Ammonia.
CID Gas (Triple Quad only)
Argon is recommended for use as a Collision Induced Dissociation gas for MS/MS in the triple
quadrupole MS, with a typical flow rate of 1 mL/min. The argon must have a purity of greater
than 99%, and be regulated to 1
−
3 psi (0.1
−
0.2 bar).
GC Carrier Gas
Helium
Helium is required as a carrier gas for the GC, with a minimum 99.999% ultra-high purity, and
less than 1.0 ppm each of water, oxygen, and total hydrocarbons. The minimum requirement is
one 257 ft
3
tank with an Alltech regulator #AL8111, or equivalent tank and regulator.
The presence of greater than 1 ppm oxygen or water in the carrier gas supply may
significantly affect the performance of the 1200 GC/MS. It may also damage such
components as the capillary column, filaments, and multiplier. Varian recommends that
you verify that your gas suppliers use controlled tanks to ensure that purity standards
are maintained. If you purchase pure gases in contaminated tanks, you may end up with
a contaminated system requiring costly and time-consuming repair.
Filter
Use of a carrier gas filter is required for optimum performance and to protect your system from
potential contamination. Your GC Accessory Kit includes a GC/MS Gas Clean Oxygen/Moisture
filter (part number CP-17973) and filter base. This easy-to-remove gas filter cartridge combines
three highly adsorptive materials in one filter to remove water, oxygen, and organic compounds
to purify the GC/MS gas. Carrier gas filters should be installed in a location where the indicator
is visible. The filter should be replaced when the indicator shows that the filter is saturated, or
after one year of service. For replacement procedures, refer to the instructions enclosed with
your filter.
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1200/1200L MS Pre-installation Instructions
