Indicator:
Measuring Range:
+ 0.4~1ppm, Number of Pump Strokes 4
+ 1~25ppm, Number of Pump Strokes 2
+ 25~62.5ppm, Number of Pump Strokes 1
+ 62.5ppm~187ppm, Number of Pump Strokes 1/2
Sampling Time: 1.5 minute per pump stroke
Colour Change: Pale yellow → Gray
Reaction Principle: C6H5OH + Ce(NO3)6^2- → C6H5OCe(NO3)5N
Coefficient of Variation: 15% (for 1 to 5 ppm), 10% (for 5 to 25 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
0.4 to
1 ppm |
1 to
25 ppm |
25 to
62.5 ppm |
62.5 to
187 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1.5 minutes per pump stroke |
| Detecting Limit |
0.1 ppm (n = 4) |
| Colour Change |
Pale yellow → Gray |
| Reaction Principle |
C6H5OH + Ce(NO3)62- → C6H5OCe(NO3)5N |
| Coefficient of Variation |
15% (for 1 to 5 ppm), 10% (for 5 to 25 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 |
2000 ppm |
Unclear demarcation |
White |
| Amines |
2000 ppm |
Unclear demarcation |
White |
| Cresol |
|
+ |
Gray |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Naphthalene |
by Scale |
2 |
0.5 to 14 ppm |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 5 ppm |
- |
3 to 10 % |
