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Safety Practices and Hazards
To reduce the possibility of fire or explosion:
Use 'Instrument Grade' acetylene that is at least 99.5% pure.
Turn off fuel gas at the cylinder when you have finished your flame
analysis.
Refer also to your local regulations governing the use of acetylene.
Nitrous Oxide
The conversion of high pressure N
regulator can cause excessive cooling and eventual freezing of the
regulator. To prevent regulator malfunction and possible flashback,
the gas should be heated with an in-line or wrap-around heater.
Burners
Improper or careless use of burners can create explosion hazards
and fire hazards which can cause death, serious injury to personnel
and damage to equipment and property.
Whenever you handle burners, remember that the burner may be
very hot. Always use protective gloves to handle hot burners.
Burners are clearly identified by the fuel/oxidant combination for
which they are intended. Always fit the correct burner. Never
attempt to use an air-acetylene burner for nitrous oxide-acetylene, as
this will cause a flashback.
Use only acetylene as the fuel gas.
Use only air or nitrous oxide as oxidant. Never attempt to use oxygen
or oxygen-enriched air, as this will cause a flashback.
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Test the supply 'plumbing' regularly for leaks with a brush and
soapy water or a proprietary leak-detecting solution (never use a
naked flame when testing for leaks)
'Crack' the cylinder before use by gently opening the valve to
check for any drops or spray of acetone. Any cylinder showing
acetone should be returned to the supplier for replacement.
O liquid to N
O gas at the
2
2
Agilent 55B AA Spectrometer User's Guide
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