Vạch chỉ thị: 10~300 ppm
Thang đo: 10~300 ppm, bơm 2 lần
Thời gian lấy mẫu: 2 phút mỗi lần bơm
Chuyển đổi màu: Yellow → Dark brown → Pale blue after few minutes
Phương trình phản ứng: CH3CO2(CH2)3CH3 + Cr6+ + H2SO4 → Cr3+
Hệ số biến đổi: 15% (10 ~ 100 ppm), 10% (100~300 ppm)
Số ống trong hộp: 10
Dùng thích hợp với bơm: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
10 to 300 ppm |
| Number of Pump Strokes |
2 |
| Correction Factor |
1 |
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
2 ppm (n=2) |
| Colour Change |
Yellow → Dark brown → Pale blue after few minutes |
| Reaction Principle |
CH3CO2(CH2)3CH3 + Cr6+ + H2SO4 → Cr3+ |
| Coefficient of Variation |
15% (for 10 to 100 ppm), 10% (for 100 to 300 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 |
| Alcohols |
|
+ |
Dark brown (few minutes later) → Pale blue |
| Ketones |
|
+ |
| Esters |
|
+ |
| Aromatic HCs |
|
+ |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Isobuty Acrylate |
Factor: 0.26 |
2 |
2.6 to 78 ppm |
| Butyl Acrylate |
Factor: 0.7 |
2 |
7 to 210 ppm |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 150 ppm |
200 ppm |
1.7 to 7.6% |
