| Measuring Range |
| 8 to 20 ppm |
20 to 2000 ppm |
2000 to 6400 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1.5 minutes per pump stroke |
| Detecting Limit |
4 ppm (n=2) |
| Colour Change |
Yellow → Red |
| Reaction Principle |
3HCHO + (NH2OH)3H3PO4 → H3PO4
H3PO4 + Base → Phosphate |
| Coefficient of Variation |
10% (for 8 to 200 ppm), 5% (for 500 to 2000 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. |
