Indicator: 0.1~3.0ppm
Measuring Range:
+ 0.05 to 3.0 ppm, Number of Pump Strokes 5
+ 3.0 to 6.9 ppm, Number of Pump Strokes 3
+ 6.9 to 24 ppm, Number of Pump Strokes 1
Sampling Time: 1 minute per pump stroke
Colour Change: Yellow → Brown
Coefficient of Variation: 10% (for 0.05 to 1.0 ppm), 5% (for 1.0 to 3.0 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 0.05 to 3.0 ppm |
3.0 to 6.9 ppm |
6.9 to 24 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1 minute per pump stroke |
| Detecting Limit |
0.025 ppm (n=5) |
| Colour Change |
Yellow → Brown |
| Reaction Principle |
Hydrogen fluoride reacts with indicator to produce brown stain. |
| Coefficient of Variation |
10% (for 0.05 to 1.0 ppm), 5% (for 1.0 to 3.0 ppm) |
| Shelf Life |
2 Years |
| Corrections for temperature & humidity |
Temperature correction is necessary
Humidity 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 |
| Nitric acid |
 1.0ppm |
+ |
Pale reddish violet |
| Hydrogen chloride |
0.1ppm |
+ |
Reddish violet |
| Hydrogen peroxide |
10ppm |
No |
No |
