Indicator: 10 to 800 ppm
Measuring Range:
+ 3.3 to 10 ppm, Number of Pump Strokes 4
+ 10 to 800 ppm, Number of Pump Strokes 2
Sampling Time: 2 minute per pump stroke
Colour Change: Yellow → Red
Reaction Principle: 3CH2CHCHO + (NH2OH)3 • H3PO4 → H3PO4 + Base → Phosphate
Coefficient of Variation: 10% (for 10 to 200 ppm), 5% (for 200 to 800 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 3.3 to 10 ppm |
10 to 800 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
2 ppm (n=4) |
| Colour Change |
Yellow → Red |
| Reaction Principle |
3CH2CHCHO + (NH2OH)3 • H3PO4 → H3PO4 + Base
→ Phosphate |
| Coefficient of Variation |
10% (for 10 to 200 ppm), 5% (for 200 to 800 ppm) |
| Shelf Life |
2 Years |
| Corrections for temperature & humidity |
Temperature correction is necessary |
| 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 |
| sulphur dioxide |
1/5 time |
+ |
No |
| Acetaldehyde |
1/5 time |
+ |
Red |
| Acetone |
1 time |
+ |
Red |
| Methyl Ethyl Ketone |
3 times |
+ |
Red |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| - |
C 0.1 ppm |
2.8 to 31% |
