Indicator: 1 to 100 ppm
Measuring Range:
+ 0.4 to 1 ppm, Number of Pump Strokes 4
+ 1 to 100 ppm, Number of Pump Strokes 2
+ 100 to 350 ppm, Number of Pump Strokes 1
Sampling Time: 3 minute per pump stroke
Colour Change: Yellow → Reddish brown
Reaction Principle: 15% (for 1 to 20 ppm), 10% (for 20 to 100 ppm)
+ C2H4O → 2HCHO,
+ 3HCHO + (NH2OH)3H3PO4 → H3PO4,
+ H3PO4 + Base → Phosphate
Coefficient of Variation:
Nr. of tests: 5
Pump: GV-100S/110S
Catalog
Manual
manual tube
Performance
| Measuring Range |
| 0.4 to 1 ppm |
1 to 100 ppm |
100 to 350 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
3 minutes per pump stroke |
| Detecting Limit |
0.1 ppm (n=4) |
| Colour Change |
Yellow → Reddish brown |
| Reaction Principle |
C2H4O → 2HCHO
3HCHO + (NH2OH)3H3PO4 → H3PO4
H3PO4 + Base → Phosphate |
| Coefficient of Variation |
15% (for 1 to 20 ppm), 10% (for 20 to 100 ppm) |
| Shelf Life |
1 Year |
| 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, Ketones |
|
+ |
Reddish brown |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Epichlorohydrin |
1.2 |
2 |
1.2 to 120 ppm |
| Propylene oxide |
1.0 |
1 |
1 to 100 ppm |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 1 ppm(2014) |
- |
3.0 to 100% |
