Indicator: 0.1 to 5 ppm
Measuring Range:
+ 0.1 to 5 ppm, Number of Pump Strokes 4
+ 5 to 10 ppm, Number of Pump Strokes 2
Sampling Time: 2 minute per pump stroke
Colour Change: Yellow → Pale orange
Reaction Principle:
+ C2H4O → 2HCHO
+ 3HCHO + (NH2OH)3H3PO4 → H3PO4
+ H3PO4 + Base → Phosphate
Coefficient of Variation: 15% (for 0.1 to 1 ppm), 10% (for 1 to 5 ppm)
Nr. of tests: 5
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
0.05 ppm (n=4) |
| Colour Change |
Yellow → Pale orange |
| Reaction Principle |
C2H4O → 2HCHO
3HCHO + (NH2OH)3H3PO4 → H3PO4
H3PO4 + Base → Phosphate |
| Coefficient of Variation |
15% (for 0.1 to 1 ppm), 10% (for 1 to 5 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 |
| Acetaldehyde |
1.5ppm |
+ |
Pale orange |
| Formaldehyde |
0.5ppm |
+ |
Pale orange |
| Ketones |
15ppm |
+ |
Pale orange |
| Alcohols |
300ppm |
 |
No |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 1 ppm(2014) |
- |
3.0 to 100% |
