Safety Requirements - PerkinElmer Clarus SQ 8 MS Series Hardware Manual

The gas delivery pressure required is 15 psi (103 kPa) to the
bulkhead fitting (1/8 in. Swagelok) on the mass spectrometer.
If ammonia is used for chemical ionization, all fittings and tubing
Ammonia
must be stainless steel to avoid corrosion. A single-stage regulator is
Methane
required for ammonia, rated for corrosive service. Also, the
forepump must be vented to a fume hood or trap.
Isobutane
A high-purity, stainless-steel diaphragm, two-stage regulator is
required for methane and isobutane with a final delivery pressure of
15 psi (103 kPa). Clean tubing must be used. It must be solvent-
washed and nitrogen-dried. The bulkhead connector at the rear of the
instrument is a 1/8 in. Swagelok fitting.
The use of commercial gas purifiers for reagent gas is recommended.

Safety Requirements

Gas Delivery Copper tubing that is free of grease, oil and organic
Lines material must always be used with the Clarus MS on all gas
lines, except ammonia reagent gas. Ammonia reagent gas
requires stainless steel.
Solvent-washed copper tubing must be used to avoid
contamination of the Gas Chromatograph. Suitable solvents
are acetone or dichloromethane (do not use if negative
chemical ionization is planned) followed by methanol.
Clean helium or nitrogen should be used to blow any
residual solvent from the tubing. Cap all unused tubing.
Care must be taken not to kink or overstress the gas
delivery lines. Strain relief consisting of two one inch coils
of tubing should be installed at every gas line connection.
Gas Cylinders All gas cylinders should be firmly clamped to a suitable
surface.
Gas cylinders should be located outside of the laboratory
whenever possible, and should always be stored and
operated in a vertical position.
Warnings and Safety Information
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