Ethyl Mercaptan - 0.5 to 120 ppm Detection Tubes
- Detecting Limit: 0.2 ppm (10 pump strokes)
- Color Change: White to Yellow
- Corrections for temperature & humidity: Temperature correction is necessary
- Relative standard deviation: 10% (for 5 to 40 ppm), 5% (for 40 to 120 ppm)
- Shelf Life: 3 years
- Reaction Principle: 2C2H5SH + PdSO4 → (C2H5S)2Pd + H2SO4
Perfrormance:
| Measuring Range: |
0.5 to 5 ppm |
5 to 120 ppm |
| Number of pump strokes: |
2 to 10 (200 to 1000 ml) |
1 (100 ml) |
| Correction Factor: |
1/2 to 1/10 |
1 |
| Sampling Time: |
4 to 20 min |
2 min |
Possible coexisting substances and their interferences:
| Substance |
Concentration |
Interference |
Changes color by itself to |
| Acetylene |
≧ 2000 ppm |
+ |
Pale brown (whole layer) |
| Carbon monoxide |
≧ 2000 ppm |
+ |
Pale (whole layer) |
| Ethylene |
≧ 2000 ppm |
+ |
Pale brown (whole layer) |
| Hydrogen sulfide |
≧ 500 ppm |
+ |
No |
| Mercaptans |
|
+ |
Yellow |
| Up to 500 ppm of hydrogen sulfide is trapped in the pretreatment (white) layer. |
Ethyl Mercaptan - 0.5 to 120 ppm Detection Tubes
Reaction Principle:
2C2H5SH + PdSO4 to (C2H5S)2Pd + H2SO4
Possible Coexisting Substances And Their Interference:
| Substance:
|
Concentration:
|
Interference:
|
Changes Color By Itself To:
|
| Acetylene
|
≧ 2000 ppm
|
+
|
Pale Brown (Whole Layer)
|
| Carbon Monoxide
|
≧ 2000 ppm
|
+
|
Pale Brown (Whole Layer)
|
| Ethylene
|
≧ 2000 ppm
|
+
|
Pale Brown (Whole Layer)
|
| Hydrogen Sulphide
|
≧ 500 ppm
|
+
|
NO
|
| Mercaptans
|
X
|
+
|
Yellow
|
Ethyl Mercaptan - 0.5 to 120 ppm Detection Tubes
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