Specifications And Requirements Of The Burner Gases - PerkinElmer AAnalyst 700 User Manual

Laboratory Requirements
Burner gases
Two types of flame are commonly used for atomic absorption analyses with flame
atomization: the air/acetylene flame and the nitrous oxide/acetylene flame. The
specifications and requirements for the burner gases are given below:
Table 6-1. Specifications and Requirements of the Burner Gases
Gas
Acetylene
(ethyne, C H )
2 2
Air
Nitrous oxide
(dinitrogen monoxide, N

Set the outlet gauge pressure for each gas to a value just below the maximum
value (P

Always set the same outlet gauge pressure for air and nitrous oxide.

Never set the outlet pressure to a value exceeding the maximum pressure
(P
Warning: Acetylene – Explosion Hazard
Acetylene can decompose explosively at pressures higher than 103 kPa/
1.03 bar/15 psig.
 Always make sure that the acetylene outlet gauge pressure is below this
value.
6-10
Purity
99.996%, atomic
absorption grade in
acetone
oxygen ΟΜΒΞ=particle
free; water free
99.996%
O)
2
).
max
).
max
Outlet Gauge Pressure
kPa bar
P P P P
min max min max
90 100 0.9 1.0
450 500 4.5 5.0
450 500 4.5 5.0
psig
P P
min max
13.0 14.5
65.0 72.5
65.0 72.5
W5.7
0993-5255