Chemical Adsorption Methods
Preparation steps for standard methods of chemical adsorption have been developed over a number of years and are recommended starting points for creating other methods.
For each method, the recommended vacuum set point is 5 mmHg; the recommended temperature increase rate is 10 ºC per minute. |
Method 1 * | Prepares the sample for carbon monoxide as the analysis gas. |
Method 2 * | Prepares the sample for hydrogen as the analysis gas. |
Method 3 | Prepares the sample for oxygen as the analysis gas; usually used with silver. |
Method 4 | Prepares the sample for hydrogen-oxygen titration. |
* Requires repeat analysis
Samples are evacuated to the vacuum set point and evacuation continues for the specified time.
- Flow (soak). Ramp up to the specified temperature, and then continue flowing (soaking) for the specified time.
- Time. Total time below the vacuum set point that the sample spends at the specified temperature or pressure.
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