Ammonia 5.0 Research Grade (99.999% purity)
A two-stage, 0
−
15 psi (0
−
1 bar) pressure regulator that has a stainless steel diaphragm is
recommended. The output pressure to the 1200 MS should be set to 3
−
5 psi (0.2
−
0.3 bar). Gas
lines for ammonia should be made of stainless steel. All gas lines should be free of oil and
preferably flame treated or solvent washed.
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 gas for Collision Induced Dissociation (CID)
MS/MS in the triple quadrupole MS, with typical flow rates of 1 mL/min. The argon must have a
purity of greater than 99%, and be regulated to 5 psi.
GC Carrier Gases
Helium
Helium is required as a carrier gas for the GC, with a minimum of 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.
03-914961-00:6
9
of 24
1200/1200L MS Pre-installation Instructions
