Indicator: 5 to 100 ppm
Measuring Range:
+ 2.5 to 5 ppm, Number of Pump Strokes 2
+ 5 to 100 ppm, Number of Pump Strokes 1
Sampling Time: 1 minute per pump stroke
Colour Change: Yellow → Red
Reaction Principle: 3CH3CHO + (NH2OH)3H3PO4 → H3PO4, H3PO4 + Base → Phosphate
Coefficient of Variation: 10% (for 5 to 20 ppm), 5% (for 20 to 100 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
| 2.5 to 5 ppm |
5 to 100 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1 minute per pump stroke |
| Detecting Limit |
0.25 ppm (n=2) |
| Colour Change |
Yellow → Red |
| Reaction Principle |
3CH3CHO + (NH2OH)3H3PO4 → H3PO4
H3PO4 + Base → Phosphate |
| Coefficient of Variation |
10% (for 5 to 20 ppm), 5% (for 20 to 100 ppm) |
| Shelf Life |
2 Years |
| Corrections for temperature & humidity |
Unnecessary |
| Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Ammonia |
|
 |
No |
| Acrolein |
3/5 times |
+ |
Red |
| Acetone |
2 times |
+ |
Red |
| Methyl ethyl ketone |
6 times |
+ |
Red |
| MIBK |
10 times |
+ |
Red |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| - |
C 25 ppm |
4 to 60% |
