|
|
| Hydrogen peroxide |
H2O2 |
NO.32D |
| Performance |
Measuring
Range
|
0.5 to 40 ppm |
Sampling Hours
|
1 to 10 hours |
Detecting Limit
|
0.03 ppm (10 hours) |
Color Change
|
White ---> Yellow |
| Reaction
Principle |
Hydrogen peroxide
reacts with titanium
sulfate to produce yellow color stain.
H2O2 + Ti(SO4)2 ---> Yellow reaction product |
| Coefficient
of Variation |
10% (for 5 to 40
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
|
Concentration
|
Interference |
Change
color by itself |
Nitrogen dioxide
|
-
|
No effect
|
No discoloration
by itself |
Chlorine,Ozone
|
- |
No effect
|
No discoloration
by itself |
| Acetaldehyde |
20 ppm |
Unclear demarcation |
No discoloration
by itself |
| Formaldehyde |
10 ppm |
Minus error |
No discoloration
by itself |
| Calibration
gas generation |
Diffusion tube method |
TLV-TWA
|
TLV-STEL
|
Explosive
range |
| 1ppm |
- |
- |
|
