Hardware manual

A-4 Agilent 7500 Series ICP-MS Hardware Manual
Appendix
WARNING
Use 20% Oxygen and 80% Ar gas mixture. There is an increased risk of explosion or
fire if higher concentrations of Oxygen are used.
If the equipment is used connected to highly concentrated oxygen gas, and the
oxygen gas keeps flowing due to the above-mentioned irregularities, dangers arise
as detailed below.
• Inflammability, explosibility, etc. of oxygen
• Since oxygen is an ignitable gas, oxygen does not burn by itself, but it assists
the combustion of other substances.
• Oxygen is a strong oxidizing agent and reacts with inflammable substances
and deoxidizing substances, thereby giving rise the danger of fire or explosion.
• When heated, a rise in pressure results, which is accompanied by the danger
of bursting.
• Influence on the human body
• Oxygen is toxic and inhalation of it may cause coughing, dizziness, sore throat,
and damage to eyesight.
• As for influences resulting from exposure for a short time, oxygen may cause
irritation of the respiratory tract and may have an influence on the central
nervous system, lungs, and eyes.
The concentration of oxygen that is the safety limit of toxication symptoms
due to high concentration of oxygen for a short time period is 46 vol%, which
causes a decrease in the activation of oxidizing enzymes in cells, resulting in
oxygen toxication symptoms such as epilepsy-like convulsions throughout the
whole body, dizziness, nausea, difficulty breathing, muscular convulsions,
confusion, auditory hallucination, damage to eyesight, or sharp pain in the
toes.
• As for influences resulting from exposure for a long time or repeated exposure,
the concentration of oxygen that is the safety limit of toxication symptoms due
to high concentration of oxygen for an extended period is 36 vol%.
The safety range is 18 - 25 vol%.
CAUTION
Be sure to wear solvent resistant gloves and protective glasses when handling organic
solvents.