Hardware manual

2-8 Agilent 7500 Series ICP-MS Hardware Manual
2Precautions
Storing Argon Safely
Hydrogen (H
2
) Gas
WARNING
Argon, which is used to create the plasma, is a dangerous gas only if it displaces the
air you are breathing or is mishandled in its storage cylinder. Take the following
precautions to prevent an explosion or suffocation hazard:
• Secure the cylinder valve caps and move the cylinder with an approved handcart.
• Label the gas cylinder clearly and store it vertically away from all ignition and
heat sources. The Ar cylinder will release argon through the pressure-relief
device if the temperature exceeds 52 °C (125 °F).
• Protect a cylinder stored outside from the sun and extreme temperatures. Place
the cylinder on a level surface above ground.
• Attach the argon hoses tightly to both the instrument and gas source. Route the
hoses so they cannot be damaged or crimped. Check for leaks using a soap
solution or an electronic leak detector.
• Provide adequate ventilation around the gas cylinders, especially if they are
placed in a small storeroom.
WARNING
The Agilent 7500ce/cs use hydrogen (H
2
) gas in the standard configuration, while
the Agilent 7500cx uses hydrogen (H
2
) gas as an optional gas. While the Agilent
7500 models are designed for safe operation under normal usage, hydrogen gas has
the following characteristics and extreme care must be taken to safely control its
use.
• Hydrogen is flammable over a wide range of concentrations. At atmospheric
pressure, hydrogen is combustible at concentrations from 4% to 75%.
• Hydrogen has the highest burning velocity of any gas.
• Hydrogen has a very low ignition energy.
• Hydrogen temperature increases as the gas expands.
• Hydrogen that is allowed to expand rapidly from high pressure can actually
self-ignite.
• Hydrogen burns with a nonluminous flame that is often invisible under bright
light.