14
Gas sampling and gas conditioning technology
9-3.20-MD
12.1.2
INTERFERENCE EFFECTS
The following list shows the cross-sensitivity of the major gases at 20 °C and 50 °C. All values are
based on zero point calibration with N
2
and end value calibration at 100% Vol. %O2. The
deviations apply as appropriate for 100% Vol. of the corresponding gas.
Gas
Formula
20° C
50 °C
Acetaldehyde
C
2
H4O
- 0.31
- 0.34
Acetone
C
3
H6O
- 0.63
- 0.69
Acetylene
C
2
H2
- 0.26
- 0.28
Ammonia
NH
3
- 0.17
- 0.19
Argon
Ar
- 0.23
- 0.25
Benzene
C
6
H6
- 1.24
- 1.34
Bromine
Br
2
- 1.78
- 1.97
Butadiene
C
4
H6
- 0.85
- 0.93
n-butane
C
4
H10
- 1.10
- 1.22
Iso butylene
C
4
H7
- 0.94
- 1.06
Chlorine
Cl
2
- 0.83
- 0.91
Diacetylene
(CHCl)
2
- 1.09
- 1.20
Nitrous oxide
N
2
O
- 0.20
- 0.22
Ethane
C
2
H4
- 0.43
- 0.47
Ethylbenzene
C
8
H10
- 1.89
- 2.08
Ethylene
C
2
H4
- 0.20
- 0.22
Ethylene glycol
(CH
2
OH) 2
- 0.78
- 0.88
Ethylene
C
2
H4O2
- 0.54
- 0.60
Furan
C
4
H4O
- 0.90
- 0.99
Helium He
+ 0.29
+ 0.32
n-hexane
C
6
H14
- 1.78
- 1.97
Hydrogen chloride
HCL
- 0.31
- 0.34
Hydrogen fluoride
HF
+ 0.12
+ 0.14
Hydrogen sulphide
H
2
S
- 0.41
- 0.43
Carbon dioxide
CO
2
- 0.27
- 0.29
Carbon monoxide
CO
- 0.06
- 0.07
Krypton
Kr
- 0.49
- 0.54
Methane
CH
4
- 0.16
- 0.17
Methanol
CH
4
O
- 027
- 0.31
Methylene chloride
CH
2
Cl2
- 1.00
- 1.10
Methylpropene
C4H
8
- 0.94
- 1.06
Monosilane
SiH
4
- 0.24
- 0.27
Neon
Ne
+ 0.16
+ 0.17
n-octane
C
8
H18
- 2.45
- 2.70
Phenol C6H6O
- 1.40
- 1.54
Propane
C
3
H8
- 0.77
- 0.85
Propylene
C
3
H6
- 0.57
- 0.62
Propylene chloride
C
3
H7Cl
- 1.42
- 1.44
Propylene oxide
C
3
H6O
- 0.90
- 1.00
Oxygen
O
2
+100.00
+100.00
Sulfur dioxide
SO
2
- 0.18
- 0.20
Sulphur hexafluoride
SF
6
- 0.98
- 1.05
Silane
SiH
4
- 0.24
- 0.27
Nitrogen
N
2
0.00
0.00
Nitrogen dioxide
NO
2
+ 5.00
+ 16.00
Nitrogen (mon)oxide
NO
+ 42.70
+ 43.00
Styrene
C
8
H8
- 1.63
- 1.80
Toluene
C
7
H8
- 1.57
- 1.73
Vinyl chloride
C
2
H3Cl
- 0.68
- 0.74
Vinyl fluoride
CH
3
F
- 0.49
- 0.54
Water (vapour)
H2O
- 0.03
- 0.03
Hydrogen
H
2
+ 0.23
+ 0.26
Xenon
Xe
- 0.95
- 1.02
