Indicator: 2.5 to 60 ppm
Measuring Range:
+ 0.5 to 1.25 ppm, Number of Pump Strokes 5, 45 seconds per pump stroke
+ 1.25 to 2.5 ppm, Number of Pump Strokes 2, 45 seconds per pump stroke
+ 2.5 to 60 ppm, Number of Pump Strokes 1, 45 seconds per pump stroke
+ 60 to150 ppm, Number of Pump Strokes 1/2, 30 seconds
Colour Change: Yellow →Pink
Coefficient of Variation: 10% (for 2.5 to 20 ppm), 5% (for 20 to 60 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 0.5 to 1.25 ppm |
1.25 to 2.5 ppm |
2.5 to 60 ppm |
60 to150 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
| 45 seconds per pump stroke |
30 seconds |
|
| Detecting Limit |
0.1 ppm (n=5) |
| Colour Change |
Yellow →Pink |
| Reaction Principle |
Hydrogen cyanide reacts with the reagent to form intermediate material which stains indicator pink. |
| Coefficient of Variation |
10% (for 2.5 to 20 ppm), 5% (for 20 to 60 ppm) |
| Shelf Life |
2 Years |
| Corrections for temperature & humidity |
Temperature correction is necessary |
| Store the tubes at cool and dark place. |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Ammonia |
 2.5 ppm |
 |
No discolouration |
| Hydrogen chloride |
5.0 ppm |
+ |
Pink at 5.0 ppm |
| Nitric acid |
10.0 ppm |
+ |
Pink at 10.0 ppm |
| Sulphur dioxide |
1.0 ppm |
+ |
Pink at 0.8 ppm |
| Nitrogen dioxide |
10.0 ppm |
+ |
Pink at 8.0 ppm |
| Hydrogen fluoride |
25.0 ppm |
+ |
Pink at 21.0 ppm |
| Hydrogen sulphide |
0.5 ppm |
+ |
Pink at 0.5 ppm |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Acetone cyanohydrine |
1.0 |
1 |
2.5 to 60 ppm |
| Boron trichloride |
0.9 |
1 |
2.25 to 54 ppm |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| - |
C 4.7 ppm (2014) |
5.6 to 40% |
