|
|
| Performance |
Measuring
Range
|
2.5 to 1000 ppm |
Sampling Hours
|
0.5 to 10 hours |
Detecting Limit
|
0.5ppm (10 hours) |
Color Change
|
Purple --->
Yellow |
| Reaction
Principle |
Ammonia neutralizes
analyzing agent to discolor the indicator to yellow. |
| Coefficient
of Variation |
10% (for 25 to
500 ppm¥hr) |
| Shelf
Life |
3 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 |
Amines, Hydrazine
|
Plus error
|
Produce yellow
stain |
Aromatic amines
|
No effect
|
No discoloration |
| Other
substance measurable with this detector tube |
Substance
|
Correction
Factor
|
Sampling
Time
|
Measuring
Range |
Dimethylamine
|
0.75
|
0.5
to 10 hours
|
1.9 to 750 ppm |
N,N- Dimethylethylamine
|
1.6
|
4 to 1600 ppm |
Hydrazine
|
0.65 |
1.6 to 650 ppm |
Triethylamine
|
2.1 |
5.3 to 2100 ppm |
| Calibration
gas generation |
Permeation tube method |
TLV-TWA
|
TLV-STEL
|
Explosive
range |
| 25ppm |
35ppm |
15 to 28% |
|
