ABSTRACT
Properties of Premixed Flames Used in Atomic Spectroscopy
Maximum Temperature°C
Gas Mixture
Maximum Flame speed cm sec−1
Calculated
Measured
Air–hydrogen
320
2,100
2,045
Air–propane
43
1,925
1,925
Air–coal gas
ca 55
ca 1,840
ca 1,840
Air–acetylene
170
2,290
2,275
50% oxygen–50%s nitrogen–acetylene
640
2.815
–
Oxygen–hydrogen
1.190
2.815
2,660
Oxygen–propane
390
2,835
2,850
Oxygen–coal gas
–
–
2,720
Oxygen–acetylene
1,130
3,060
3,140
Oxygen–cyanogen (1:1 molar ratio)
270
4,540
4,370
Nitrous oxide–hydrogen
390
ca 2,660
2,650
Nitrous oxide–60% propane–40% butane
300
–
2,550
Nitrous oxide–acetylene
285
2,950
2,800
Nitrous oxide–MAPP a gas
140
–
2,750
Nitric oxide–acetylene
87
3,090
3.095
Proprietary mixture of methylacetylene and propadiene (60–70%) with propylene and other stabilizing hydrocarbons.
Based on Willis, J. B., Applied Optics, 7, 1295, 1968, and Analytical Flame Spectroscopy, Mavrodineanu, R., Ed., Macmillan, London, 1970.