| CH3CHiOHjCH3ii-C3H7OHj |
 |
Performance
| Measuring Range |
| 25 to 50 ppm |
50 to 800 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
3 minutes per pump stroke |
| Detecting Limit |
5 ppm (n=2) |
| Colour Change |
Pink → Pale blue |
| Reaction Principle |
C2H5OH + Cr6++ H2SO4 →Cr3+ |
| Coefficient of Variation |
15% (for 50 to 200 ppm), 10% (for 200 to 800 ppm) |
| 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
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Alcohols |
|
+ |
Produce similar stain by themselves. |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Divinyl methoxysilane |
0.05 |
2 |
2.5 to 40 ppm |
| Ethylene glycol MEE |
1.25 |
2 |
62.5 to 1000 ppm |
| Ethylene glycol MEEAc |
0.12 |
3 |
6 to 96 ppm |
| 1-Methoxy-2-propanol |
1.0 |
4 |
50 to 800 ppm |
| Propyl alcohol |
1.3 |
1 |
65 to 1040 ppm |
| Vinyl trimethoxysilane |
0.05 |
2 |
2.5 to 40 ppm |
| Ethylene glycol MBE |
by scale |
2 |
30 to 1000 ppm |
| Ethylene glycol MME |
by scale |
2 |
15 to 900 ppm |
| Ethylene glycol MMEAc |
by scale |
2,4 |
20 to1300 ppm |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 200 ppm |
400 ppm |
2 to 12.7% |
