Indicator: 0.2~5ppm
Measuring Range:
+ 0.1 ~ 5 ppm, Number of Pump Strokes 5
+ 5 ~ 40 ppm, Number of Pump Strokes 1
Sampling Time: 1.5 minute per pump stroke
Colour Change: Yellow → Reddish Brown
Reaction Principle: 3HCHO + (NH2OH)3H3PO4 → H3PO4, H3PO4 + Base → Phosphate
Coefficient of Variation: 10% (for 0.1 to 0.5 ppm), 5% (for 0.5 to 5 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1.5 minutes per pump stroke |
| Detecting Limit |
0.05 ppm (n=5) |
| Colour Change |
Yellow → Reddish Brown |
| Reaction Principle |
3HCHO + (NH2OH)3H3PO4 → H3PO4
H3PO4 + Base → Phosphate |
| Coefficient of Variation |
10% (for 0.1 to 0.5 ppm), 5% (for 0.5 to 5 ppm) |
| Shelf Life |
3 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 |
| Aldehydes |
|
+ |
Reddish brown |
| Ketones |
|
+ |
Reddish brown |
| Acid Gases |
|
+ |
Red |
| Organic acids |
|
No |
No |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Diisobutyl ketone |
5.8 |
4 |
0.58 to 29 ppm |
| Methaldehyde |
0.65 |
3 |
0.065 to 3.25 ppm |
| Propionaldehyde |
7.6 |
1 |
0.76 to 38 ppm |
| Cyclohexanone |
by scale |
1/2 |
10 to 470 ppm |
| Benzaldehyde |
by scale |
1 |
4 to 92ppm |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| - |
C 0.3 ppm (2014) |
7.0 to 73% |
