PerkinElmer Clarus SQ 8 MS Series, Hardware Manual

Page: 43 / 184

Warnings and Safety Information
Reagent Gases:
Ammonia
Methane
Isobutane
Minimum purity of 99.95%.
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
must be stainless steel to avoid corrosion. A single-stage regulator is
required for ammonia, rated for corrosive service. Also, the
forepump must be vented to a fume hood or trap.
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
Lines Copper tubing that is free of grease, oil and organic 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.