1.6. Purge and Trap Technique for VOCs in Water

Try these first

1. 1.

   What does VOC stand for?

   Hint

   Think about compounds that easily evaporate.

2. 2.

   What is the purpose of the Purge phase?

   Hint

   Consider why gas might be preferred.

3. 3.

   What is the primary purpose of the Purge and Trap technique?

   • To separate compounds
   • To analyze volatile compounds in water
   • To cool substances

   Hint

   Think about the specific application of this technique.

4. 4.

   True or False: All gases can be used for purging in the Purge and Trap technique.

   • True
   • False

   Hint

   Consider what kind of reactions might occur.

5. 5.

   You have a water sample with an unknown concentration of VOCs. Describe how would you set up the Purge and Trap process to ensure accurate results.

   Hint

   Consider each phase of the technique.

6. 6.

   A lab technician reported loss of VOCs during liquid-liquid extraction. Analyze why using the Purge and Trap technique is more advantageous for this situation.

   Hint

   Look for comparisons between the effectiveness of the methods.