APPENDIX B
B - 1
TUBE DATA SHEETS
Benzene C
6
H
6
Part No.: 012-3022-005
Standard Lamp
Typical Range (ppmv)
9.8 eV
0.1 – 1000
Temperature Range: 2 - 40
°
C (36 - 104
°
F)
Temp (
°
C)
2-10
10-15
15-30
30-40
Temp (
°
F)
36-50
50-60
60-86
86-104
Measure Time (sec)
150
90
60
40
Calibration should be performed at the same temperature as the measurement.
Humidity: No effect on reading 0 - 95% RH. Humid, clean air drawn through the
tube before measurement will reduce VOC capacity.
Storage Life and Conditions: Unopened tubes can be stored for 1 year in
darkness at 5 - 25
°
C (40 - 77
°
F). Refrigeration is preferred. Open tubes should
be used within one hour to avoid loss of capacity.
Color Change: Yellow
→
Brown
→
Green
The benzene reading may be high if the green color extends to more than 3/4 of
the length. The tube may still have some capacity if there is no green color.
Note: It is preferable to recalibrate when changing batches. For more details on
tube operation see Technical Note 136.
Cross-sensitivity:
Substance
Test
Conc.
(ppmv)*
Apparent
Benzene
Response
Substance
Test
Conc.
(ppmv)*
Apparent
Benzene
Response
Toluene 400
0.1
n-Hexane 100
#
0.0
o-Xylene 200
0.0
Cyclohexane
10
#
0.4
Ethylbenzene 200 0.0
n-Octane
300 0.1
Styrene 100
0.0
β
-Pinene
50 0.0
Nitrobenzene 100 0.0
Ethanol
50 0.0
Phenol
100 0.0
Isopropanol
100 0.0
Chlorobenzene 20 2.5
Acetone
100 0.0
Dichlorobenzene 50
1.0 Cyclohexanone 200 0.0
Hydrogen
Sulfide
150 0.0
Tetrahydrofuran 100 0.0
Methane 25000**
0.0
Ethyl
acetate 100
0.0
Propane 1000
0.0
Acrylonitrile 100
0.0
Isobutane
100 0.0
Epichlorohydrin 100 0.0
Isobutylene 500
0.0
Trichloroethylene
100
66
1,3-Butadiene 300 0.0
Perchloroethylene
50 38
n-Pentane 1500
0.0
*Not necessarily the maximum allowable concentration. ** Methane has no effect
on tube capacity. Propane and higher hydrocarbons do affect capacity.
#
Higher concentrations may cause a reduced benzene response.
Note
:
Each tube contains about 3 mg of chromium compounds
.
