|
|
| 1,3-Butadiene |
CH2:CHCH:CH2 |
NO.174D |
| Performance |
Measuring
Range
|
1.3 to 200 ppm |
Sampling Hours
|
1 to 8 hours |
Detecting Limit
|
1.3 ppm (8 hours) |
Color Change
|
Reddish purple --->
Pale brown |
| Reaction
Principle |
Butadiene reacts
with permanganate to produce light brown reaction product. |
| Coefficient
of Variation |
10% (for 10 to
200 ppm¥hr) |
| Shelf
Life |
2 Years |
| Corrections
for temperature & humidity |
Temperature correction
is necessary |
| Store the
tubes at cool and dark place. |
| Possible
coexisting substances and their interferences |
Substance
|
Interference |
Change
color by itself |
Unsaturated hydrocarbons
|
Plus error
|
Produce pale brown
discoloration |
| Other
substance measurable with this detector tube |
Substance
|
Correction
Factor
|
Measuring
Range |
Ethylene
|
1.2
|
1.5 to 240 ppm |
Vinyl chloride
|
1.2
|
1.5 to 240 ppm |
Isoprene
|
2.0 |
2.5 to 400 ppm |
Trans- 1,2- Dichloroethylene
|
3.0 |
3.8 to 600 ppm |
| Calibration
gas generation |
Permeation tube method |
TLV-TWA
|
TLV-STEL
|
Explosive
range |
| 2ppm |
- |
2.0 to 12% |
|
