Vạch chỉ thị: 10 to 200 ppm
Thang đo:
+ 10 to 200 ppm, bơm 2 lần
+ 200 to 500 ppm, bơm 1 lần
Thời gian lấy mẫu: 2 phút mỗi lần bơm
Chuyển đổi màu: Yellow → Pale blue
Phương trình phản ứng: CH2:C(CH3)CO2CH3 + Cr6+ + H2SO4 → Cr3+
Hệ số biến đổi: 10% (10 ~ 50 ppm), 5% (50 ~200 ppm)
Số ống trong hộp: 10
Dùng thích hợp với bơm: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 10 to 200 ppm |
200 to 500 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
1 ppm (n=2) |
| Colour Change |
Yellow → Pale blue |
| Reaction Principle |
CH2:C(CH3)CO2CH3 + Cr6+ + H2SO4 → Cr3+ |
| Coefficient of Variation |
10% (for 10 to 50 ppm), 5% (for 50 to 200 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, Esters, Ketones |
|
+ |
Pale blue |
Other substance measurable with this detector tube
| Tube 102L Reading (n=2) |
10 |
20 |
30 |
50 |
100 |
150 |
200 |
| Allyl isothiocyanate (%) |
5 |
10 |
15 |
30 |
70 |
130 |
200 |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 50 ppm |
100 ppm |
1.7 to 8.2% |
