Indicator: 10 to 150 ppm
Measuring Range:
+ 4 to 10 ppm, Number of Pump Strokes 4
+ 10 to 150 ppm, Number of Pump Strokes 2
Sampling Time: 2 minutes per pump stroke
Colour Change: Yellow → Pale blue
Reaction Principle: (CH3)2CHCH2OH +Cr6++ H3PO4 →Cr3+
Coefficient of Variation: 15% (for 10 to 50 ppm), 10% (for 50 to 150 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
4 to 10 ppm |
10 to 150 ppm |
| Number of Pump Strokes |
4 |
2 |
| Correction Factor |
0.4 |
1 |
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
3 ppm (n=4) |
| Colour Change |
Yellow → Pale blue |
| Reaction Principle |
(CH3)2CHCH2OH +Cr6++ H3PO4 →Cr3+ |
| Coefficient of Variation |
15% (for 10 to 50 ppm), 10% (for 50 to 150 ppm) |
| Shelf Life |
3 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 |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 50 ppm (2015) |
- (2015) |
1.7 to 10.6% |
