1. Cool air to its boiling point (-195.8°C) and condense it to form liquid air.

2. Transfer the liquid air to a fractional distillation column.

3. Heat the bottom of the column to vaporize the liquid air.

4. The different components of liquid air will vaporize at different temperatures and condense at different heights in the column.

5. Xenon will condense at the top of the column.

Method 2: Gas chromatography

1. Pass a sample of air or other gas through a gas chromatography column.

2. The different components of the gas will be separated by the column.

3. Xenon will elute from the column at a characteristic time.

4. Collect the xenon fraction from the column.

Method 3: Selective adsorption

1. Pass a sample of air or other gas through a material that selectively adsorbs xenon.

2. The xenon will be adsorbed onto the material.

3. Desorb the xenon from the material by heating or by passing a different gas through the material.

4. Collect the pure xenon.