Purge the System with Nitrogen gas to remove contaminants.

• step 1. Open the outlet of Raal’s apparatus.
• step 2. Start Nitrogen Gas.
• step 3. Allow gas to flow through the system for few minutes.
• step 4. Shut off nitrogen supply after pop up massage for purging completion is displayed.

Generating boiling point data at Atmospheric pressure.

• step 1. Select the system and composition from the dropdown list.
• step 2. Close the outlet of Raal’s apparatus and open the inlet.
• step 3. Close the inlet of Raal’s apparatus after it is filled.
• step 4. Start cold water pump.
• step 5. Start Heating coil.
• step 6. Increase heating rate slowly by moving the sliding bar.
• step 7. Allow system to accommodate change in the heat.
• step 8. Observe the change in the temperature.
• step 9. Do the same until small increment in heating rate won’t rising temperature.
• step 10. Take the liquid and vapor samples.
• step 11. Repeat the procedure for different compositions.

Sample Analysis.

• step 1. Make 4 samples containing known mass of individual components of system + external standard (ES).
• step 2. Calibrate GC with this sample and note down the area for each.
• step 3. Plot the graph of mass ratio of component to ES Vs area ratio of component to ES.
• step 4. Calculate slope.
• step 5. Analyze samples using GC.
• step 6. Use slope and basic information of individual compounds (i.e. molecular wt., Density,…) to calculate mole fraction.