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Safety Precautions
Hydrogen gas, which is generally used as the carrier gas in gas chromatographs, is a
dangerous gas that explodes easily. This manual contains cautionary notes for the safe
use of hydrogen gas due to the possible danger associated with its use as the
GCMS-QP2010 Series, GCMS-QP2020, GCMS-TQ Series carrier gas.
Read these safety precautions thoroughly before using the GCMS-QP2010 Series,
GCMS-QP2020, GCMS-TQ Series, and use the product correctly. Be sure to observe
the precautions described here. They are important for ensuring safety.
Cautions related to hydrogen gas are also listed in the gas chromatograph user manual.
Please read these as well.
In this manual, the following safety-related signal words are used to explain the degree
of hazard or possible damage.
In this manual, actions that must NOT be performed and actions that must be
performed are indicated using the following two icons.
Hydrogen Gas Properties
Hydrogen is a dangerous gas which can easily explode if handled improperly. When
hydrogen is to be used as the carrier gas, be sure to understand the characteristics and
proper handling of this gas.
• Colorless, odorless gas
• Wide combustion range, combustible within range of 4 vol% to 75 vol% when mixed with
air.
• Ignites with extremely low energy.
• Easily accumulates near the ceiling, as it is lighter than air.
• Quickly mixes with air due to its high diffusion rate.
• Automatically ignites when rapidly expanding.
• The hydrogen flame is invisible, and easily carried by the wind.
• When mixed with a halogen gas such as chlorine, it explodes on direct exposure to
sunlight.
Indicates a potentially hazardous situation which,
if not avoided, could result in serious injury or
possibly death.
Indicates an action that must NOT be performed.
Indicates an action that must be performed.
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